Choosing the right size bed sheet is more than just a matter of fit — it’s about ensuring comfort, sleep quality and durability. At Dtex Homes, we understand that a perfectly fitted sheet can transform your bedtime experience. In this guide, we’ll help you measure your mattress accurately, understand UK bedding sizes, and pick the best sheet for your home.
Understanding Why Bed Sheet Size Matters
Why Choosing the Right Bed Sheet Size is Essential for Comfort
The right bed sheet size ensures your sheet stays in place throughout the night, providing a smooth surface and uninterrupted sleep. Ill-fitting sheets may bunch up or slip off, leading to discomfort. A well-fitted sheet also prevents excessive fabric wear, protecting both your bedding and mattress for long-term comfort.
Impact of Fit on Sleep Quality
Loose sheets can create uneven pressure points, while overly tight sheets can restrict airflow and cause discomfort. When the sheet hugs your mattress perfectly, it allows your body to relax and maintain an optimal sleeping temperature — essential for healthy sleep hygiene.
How Incorrect Sheet Sizes Affect Sleep and Mattress Longevity
Using the wrong sheet size can lead to frequent slipping, wrinkles, and fabric stretching. Over time, this can reduce the lifespan of your bedding and mattress. For instance, a too-small fitted sheet puts strain on elastic edges, while oversized sheets gather under your body, disrupting rest.
Consequences of Improper Fit
- Increased fabric wear due to friction.
- Loss of elasticity in fitted sheet corners.
- Reduced airflow leading to overheating during sleep.
- Shortened mattress lifespan caused by uneven tension.
The UK Standard Bedding Measurements Overview
In the UK, bedding sizes are standardized to fit various mattress dimensions. Understanding these measurements helps you choose the perfect sheet size for your bed. Below is a summary of UK standard bed sizes (you can find a detailed version at the Dtex Homes Bedding Size Chart):
Bed Sheet Size Chart (UK Standard)
| Bed Size | Mattress Dimensions (cm) | Fitted Sheet Size |
|---|---|---|
| Single | 90 x 190 | 90 x 190 + 25/30/40 (depth) |
| Double | 137 x 190 | 135 x 190 + 25/30/40 (depth) |
| King | 152 x 200 | 152 x 200 + 25/30/40 (depth) |
| Super King | 183 x 200 | 183 x 200 + 25/30/40 (depth) |
What Dtex Homes Recommends for a Perfect Bed Fit
At Dtex Homes, we recommend choosing a sheet that fits snugly yet comfortably over your mattress. For added luxury and practicality, our Deep Fitted Sheets are designed to accommodate thicker mattresses or mattress toppers, ensuring a secure and smooth finish.
Dtex Homes Bedding Tip
- For standard mattresses, a 25cm depth fitted sheet works well.
- For pillow-top or memory foam mattresses, opt for a 30cm–35cm deep fitted sheet.
- For extra-deep luxury mattresses, choose a 40cm+ fitted sheet.
How to Measure Fitted Sheets Accurately

Tools You’ll Need to Measure Your Mattress and Sheet
Before purchasing new sheets, grab a few essential tools to ensure accurate measurement:
- A measuring tape (preferably soft and flexible)
- A notepad or phone to record measurements
- Assistance (optional, but helpful for large beds)
Key Areas to Measure
Make sure to measure your mattress’s length, width, and depth. These dimensions will determine whether you need a standard, deep, or extra-deep fitted sheet.
Step-by-Step Guide to Measuring Fitted Sheets
- Remove all bedding to expose the bare mattress.
- Measure from the head to foot of the mattress for length.
- Measure from one side to the other for width.
- Measure from the top edge to the bottom edge for depth — including any topper or protector.
- Write down all measurements in both centimetres and inches for accuracy.
Measuring Sheet Length, Width, and Depth
While measuring, ensure your tape stays straight and doesn’t sink into the mattress surface. Your fitted sheet should be slightly larger than the exact mattress size for ease of fitting.
Understanding Mattress Depth
Mattress depth is often overlooked but crucial. Measure from the top seam of your mattress to where it meets the bed base. This depth determines whether you need a standard, deep, or extra-deep fitted sheet.
Common Measurement Mistakes and How to Avoid Them
- ❌ Measuring without removing existing bedding – leads to inaccurate results.
- ❌ Forgetting to include mattress toppers or protectors.
- ❌ Mixing up centimetres and inches when ordering online.
- ✅ Always double-check all three dimensions before buying.
How to Measure Fitted Sheet Depth for Deep or Extra-Deep Mattresses
To measure for deep fitted sheets or extra deep fitted sheets, press your measuring tape from the top surface (including topper) down to the bottom seam. Add an extra 2–3 cm for flexibility so the sheet tucks neatly beneath the mattress corners.
What is Standard Fitted Sheet Depth?
Standard fitted sheets typically have a depth of 25cm–28cm. These are suitable for most traditional mattresses without toppers. For detailed size reference, visit UK Bedding Size Chart.
What is a Deep Fitted Sheet and When to Choose One
Deep fitted sheets usually range from 30cm–35cm depth and are ideal for pillow-top, memory foam, or hybrid mattresses. They provide full coverage and prevent the sheet from coming loose during sleep. If your mattress is over 35cm, opt for an extra-deep fitted sheet (40cm+) for the best fit and comfort.
When Deep Fitted Sheets Are the Best Choice
- Mattresses with additional toppers or protectors
- Luxury hotel-style beds
- Adjustable or orthopedic beds
- Anyone seeking a smooth, wrinkle-free bed surface
Shop Deep Fitted Sheets Online
Explore Dtex Homes Deep Fitted Sheets Collection for premium comfort and a secure fit designed specifically for UK bed sizes.
UK Bed Sheet Size Chart – Complete Mattress and Bedding Dimensions
Finding the perfect bed sheet size is essential for a neat, comfortable, and well-fitted bed. Whether you prefer fitted sheets, flat sheets, or deep fitted sheets, understanding UK bedding dimensions ensures your purchase fits your mattress perfectly. Below is a comprehensive guide prepared by Dtex Homes, your trusted bedding expert in the UK.
UK Bed Sizes
In the UK, mattress and sheet dimensions are standardized. Knowing these sizes helps you choose the correct bedding, avoiding loose or tight fits that may affect sleep comfort.
| Bed Size | Mattress Dimensions (cm) | Mattress Dimensions (inches) |
|---|---|---|
| Single | 90 x 190 | 35 x 75 |
| Double | 137 x 190 | 53 x 75 |
| King | 152 x 200 | 59 x 79 |
| Super King | 183 x 200 | 71 x 79 |
Single, Double, King, and Super King Dimensions in cm and inches
Each bed size requires sheets that are slightly larger than the mattress to ensure a secure fit. Refer to the Dtex Homes UK Bedding Size Chart for the most accurate and updated sheet sizes.
Fitted Sheet Sizes UK – Quick Reference Chart
The chart below provides a quick reference for standard fitted sheet dimensions in the UK.
| Bed Size | Fitted Sheet Dimensions (cm) | Recommended Depth |
|---|---|---|
| Single | 90 x 190 | 25cm / 30cm / 40cm |
| Double | 137 x 190 | 25cm / 30cm / 40cm |
| King | 152 x 200 | 25cm / 30cm / 40cm |
| Super King | 183 x 200 | 30cm / 40cm |
Bed Sheet Depth Chart for Standard and Extra-Deep Mattresses
Mattress depth can vary depending on design and topper use. Choosing the correct sheet depth ensures full coverage without slipping or tightness.
- Standard Depth Sheets: 25–28cm (best for regular mattresses)
- Deep Fitted Sheets: 30–35cm (ideal for memory foam or pillow-top mattresses)
- Extra Deep Fitted Sheets: 40cm+ (suitable for luxury or hotel-style mattresses)
What Size Fitted Sheet for a Double Bed?
A Double Bed Fitted Sheet in the UK typically measures 137 x 190 cm. For deeper mattresses, choose a 30cm or 40cm depth to ensure a perfect tuck. You can browse Dtex Homes Double Fitted Sheets for options designed for UK standard beds.
King Size Bed Sheet Dimensions UK
King Size Bed Sheets are among the most popular in the UK, designed to fit mattresses measuring 152 x 200 cm. Choosing the correct fitted or flat sheet ensures a snug and elegant look for your king bed.
King Size Fitted Sheet Measurements in cm
A King Fitted Sheet typically measures 152 x 200 cm with a depth of 25cm to 40cm. At Dtex Homes, we recommend a 30cm deep fitted sheet for most modern mattresses.
Double Bed Fitted Sheet Dimensions
For a standard double mattress (135 x 190 cm), choose a Double Fitted Sheet of the same size and select depth according to mattress thickness. View our Double Sheet Collection for perfect options.
Single Fitted Sheet Dimensions
Single mattresses (90 x 190 cm) require sheets designed for smaller beds or guest rooms. Dtex Homes Single Fitted Sheets offer a smooth fit and are ideal for kids or solo sleepers.
How to Choose the Correct Bed Sheet Size for Your Bed

Matching Your Sheet to Mattress Depth and Type
When choosing sheets, it’s vital to match them not just by bed length and width but also by mattress depth. A thick or padded mattress may need a deep fitted sheet for complete coverage. Always measure before purchasing — an accurate fit extends both sheet and mattress life.
Understanding Mattress Topper and Protector Thickness
If you use a mattress topper or waterproof protector, factor in their combined thickness when selecting your fitted sheet. These layers add extra height, requiring more sheet depth to stay secure.
How to Choose Between Fitted and Flat Sheets
Fitted Sheets are ideal for convenience and a clean look, while Flat Sheets provide versatility for layering and easy washing. Many households prefer both — a fitted sheet for the base and a flat sheet for comfort.
King Size vs Super King Size – Identifying the Difference
A Super King mattress measures 183 x 200 cm, which is 30 cm wider than a King size (152 x 200 cm). Always double-check before ordering to avoid size mismatches. You can refer to Dtex Homes UK Bedding Guide for exact specifications.
Dtex Homes’ Recommendation for Standard UK Beds
At Dtex Homes, we recommend the following:
- For standard UK beds, select fitted sheets with a depth of 25cm.
- For luxury or pillow-top mattresses, go for 30–40cm deep fitted sheets.
- Match pillowcases and duvet covers from the same collection for a coordinated look.
Need help selecting? Contact us via 0161-6811742 or WhatsApp +447543796121 — our bedding specialists will assist you personally.
Types of Bed Sheets and When to Choose Each
When to Choose Fitted Bed Sheets?
Fitted bed sheets are best for everyday convenience. Their elasticated corners keep them secure around the mattress, preventing wrinkles or slips during sleep. Ideal for active sleepers or busy households.
When to Choose Flat Bed Sheets?
Flat bed sheets are versatile and elegant, offering a hotel-like experience. They can be layered under duvets or blankets, providing breathability and easy maintenance.
What is a Deep Fitted Sheet and Who Needs It?
Deep fitted sheets are designed for thicker mattresses or those with toppers. If your mattress is above 30cm, deep or extra-deep fitted sheets ensure a smooth, tucked-in look. Explore Dtex Homes Deep Fitted Sheets for premium quality options.
What is a Valance Sheet? (Fitted vs Base Valance Explained)
A valance sheet covers the bed base, adding elegance and hiding under-bed storage. A fitted valance sheet combines the practicality of a fitted sheet with the beauty of a valance, while a base valance sits beneath the mattress.
Flat Sheet vs Fitted Sheet – What’s Better for You?
Choosing between flat and fitted sheets depends on personal preference and sleeping style. Here’s a quick comparison:
Pros and Cons of Fitted vs Flat Sheets
| Type | Pros | Cons |
|---|---|---|
| Fitted Sheet | Easy to put on, stays in place, perfect fit | Harder to fold neatly |
| Flat Sheet | Versatile, breathable, ideal for layering | Needs regular tucking |
Styling Your Bed with Valance and Fitted Options
For a polished, hotel-inspired finish, pair fitted sheets with a valance sheet or bed skirt. This combination hides the base and enhances bedroom aesthetics. You can find elegant valance designs at Dtex Homes Valance Sheets Collection.
Understanding Fabric, Thread Count and Quality

What is Thread Count and Does It Really Matter?
The thread count refers to the number of threads woven into one square inch of fabric—both vertically (warp) and horizontally (weft). Many believe that higher thread counts automatically mean better quality, but that’s not always true. A well-constructed Egyptian cotton sheet with a 400-thread count can feel softer and last longer than a poorly woven 1000-thread count sheet made from low-quality fibers. What truly matters is the quality of the yarn, weave, and finishing.
Ideal Thread Count Range for UK Bedding
For most UK homes, a thread count between 200 and 800 offers a luxurious yet breathable feel. 200–400 thread count sheets are lightweight and perfect for summer, while 600–800 thread count options give a silky, hotel-style touch—perfect for cooler months.
Fabric Types – Cotton, Egyptian Cotton, Microfiber, and Polycotton
The fabric you choose greatly influences comfort, durability, and maintenance. Below is an overview of popular bedding materials in the UK:
1. 100% Cotton Sheets
Naturally breathable, hypoallergenic, and easy to care for—cotton sheets remain the UK’s favourite. They’re soft and suitable for all seasons.
2. Egyptian Cotton Sheets
Known for their luxurious softness and long-staple fibres, Egyptian cotton sheets are exceptionally smooth and durable. At Dtex Homes, we offer 100% certified Egyptian cotton bedding that ensures hotel-grade comfort and longevity.
3. Microfiber Sheets
Made from ultra-fine synthetic fibres, microfiber sheets are wrinkle-resistant and budget-friendly. These are great for guest rooms or colder climates.
4. Polycotton Sheets
A blend of polyester and cotton, polycotton sheets combine softness with durability. They dry faster and require minimal ironing—ideal for busy UK households.
How Weave and Fabric Affect Sheet Softness and Durability
The weave pattern influences the texture and lifespan of bed sheets. For instance:
- Percale weave: Crisp, cool, and perfect for summer.
- Sateen weave: Smooth and silky with a subtle sheen—ideal for winter or luxury settings.
- Twill weave: Durable and resistant to wrinkling.
Why Egyptian Cotton is Ideal for UK Bedding
The UK’s fluctuating climate demands a fabric that balances warmth and breathability. Egyptian cotton naturally regulates temperature, absorbs moisture, and feels soft against the skin. Its strength ensures longevity, making it the perfect investment for everyday comfort.
Best Sheet Materials for Different UK Climates
- Summer: Lightweight cotton or linen sheets for breathability.
- Winter: Egyptian cotton or brushed microfiber for added warmth.
- All-year comfort: 100% cotton sateen for smooth texture and balanced insulation.
Factors to Consider When Buying the Best Bedding

Choosing Size, Depth, and Fabric Based on Your Mattress
Always match your bedding to the exact mattress dimensions. For deep mattresses, choose a deep fitted sheet from Dtex Homes that offers extra depth (up to 40cm). Refer to our UK Bedding Size Chart for accurate measurements.
Considering Wash Frequency and Shrinkage
Regular washing can slightly shrink cotton sheets. Always measure before purchasing and consider pre-shrunk or blended fabrics like polycotton if you prefer low maintenance.
Bedroom Aesthetics and Sheet Colour Matching
Your bedding should complement your room’s palette. Neutral tones like white, beige, or grey are timeless, while pastel or printed designs add personality. Dtex Homes offers elegant duvet cover sets that match seamlessly with fitted sheets.
Sustainability and Eco-Friendly Bedding Options
As sustainability gains importance, choose eco-friendly bedding made from organic cotton or OEKO-TEX® certified materials. These fabrics are gentle on your skin and the planet.
How Dtex Homes Ensures Luxury and Comfort in Every Sheet
At Dtex Homes UK, we combine craftsmanship, sustainable materials, and timeless design to deliver bedding that stands out for quality and comfort. Every product is ethically sourced and rigorously tested to ensure the highest standards.
Bed Sheet Size Guide

Single Bed Sheet Size Guide
The standard Single bed in the UK measures 90 x 190 cm (3ft x 6ft3in). A single fitted sheet from Dtex Homes fits snugly with a 25–30 cm depth, ensuring a smooth and wrinkle-free look.
Double Bed Sheet Size Guide
For a Double bed (137 x 190 cm), we recommend fitted sheets sized 137 x 190 cm with up to 35 cm depth. Choose double duvet cover sets for complete coordination.
King Size Bed Sheet Size Guide
UK King size beds measure 152 x 200 cm. The ideal fitted sheet is 152 x 200 cm, with deep options available for thicker mattresses.
Super King Bed Sheet Size Guide
A Super King bed measures 183 x 200 cm. Dtex Homes offers perfectly tailored super king fitted sheets and matching duvet covers.
4ft Bed Sheet Size (Small Double)
For 4ft small double beds (120 x 190 cm), fitted sheets sized 120 x 190 cm are recommended for an optimal fit.
Custom or Non-Standard Mattress Sizes
How to Order Custom-Sized Fitted Sheets from Dtex Homes
Have a custom-sized mattress? Dtex Homes offers made-to-measure fitted sheets designed to fit any mattress size or depth perfectly.
Bed Sheet Size Guide
Fitted Sheets
Designed with elasticated corners, fitted sheets fit tightly around your mattress for a neat appearance. Available in standard, deep, and extra-deep depths.
Flat Sheets
Flat sheets offer versatility and a hotel-like feel. They can be layered between the sleeper and duvet or used as standalone summer bedding.
Deep Fitted Sheets
Ideal for mattresses with toppers, deep fitted sheets have depths ranging from 30–40 cm for full coverage.
Valance Sheets
Valance sheets elegantly drape around the bed base, hiding under-bed storage while enhancing your room’s style.
Pillowcases (Housewife, Oxford, King, and Square)
Pillowcases add both protection and décor. Choose from Housewife (standard fit) or Oxford (bordered design) styles. Dtex Homes offers all UK sizes, including King and Square.
Duvet Covers and Their Matching Sheet Sets
Duvet Cover Size Chart UK (Single, Double, King, Super King)
- Single: 135 x 200 cm
- Double: 200 x 200 cm
- King: 230 x 220 cm
- Super King: 260 x 220 cm
Explore our full duvet cover range to complete your perfect bedding set.
Bed Sheet Sizes for Different Mattress Depths

What Does Bed Sheet Depth Mean?
The bed sheet depth refers to how far a fitted sheet can stretch to cover the height of your mattress. It ensures that your sheet fits snugly around the mattress without coming loose. Choosing the correct depth is essential for a smooth, wrinkle-free finish and restful sleep.
Standard Fitted Sheet Depth
A standard fitted sheet usually fits mattresses up to 25–30cm deep. This depth is perfect for most traditional UK mattresses without toppers. If you have a mattress protector or light topper, this size will still fit comfortably.
Deep Fitted Sheets (30cm)
For mattresses with thicker padding or pillow-top designs, deep fitted sheets (around 30cm depth) are ideal. They prevent slipping and maintain a tight, hotel-style appearance even after multiple washes.
Extra Deep Fitted Sheets (40cm, 46cm)
Extra deep fitted sheets are specially designed for luxury or orthopedic mattresses that measure 40–46cm in thickness. Dtex Homes offers a range of extra-deep fitted sheets to ensure full mattress coverage and long-lasting elasticity.
How to Measure Your Mattress Thickness Properly
To find your ideal sheet depth:
- Use a measuring tape to measure from the base to the top of your mattress, including any toppers.
- Round up to the nearest centimetre.
- Add 2–3 cm to ensure a snug but non-restrictive fit.
For detailed sizing help, visit our UK Bedding Size Guide.
Buying the Best Bedding in the UK
Why Invest in High-Quality Bedding from Dtex Homes
Investing in premium bedding improves your sleep, supports skin health, and enhances your bedroom’s aesthetic appeal. Dtex Homes UK provides luxury fitted sheets crafted from 100% Egyptian cotton and soft microfiber for durability and comfort.
How to Identify Good Quality Bed Sheets
- Look for high-quality natural fibres such as Egyptian or 100% cotton.
- Choose a balanced thread count (between 300–800).
- Check for strong stitching and smooth finishing.
Understanding GSM and Weave for Comfort
GSM (grams per square meter) measures fabric density. Higher GSM indicates thicker, warmer sheets. A percale weave offers crisp coolness, while sateen weave provides a silky, luxurious texture.
Easy-Care Options for Busy Households
For families, polycotton or microfiber sheets are easy to wash, quick to dry, and wrinkle-resistant—perfect for everyday use.
Best Bedding Materials for Different Seasons in the UK
Cool and Breathable Fabrics for Summer
Opt for cotton or linen sheets to stay cool and dry during warm nights.
Warm and Cozy Fabrics for Winter
Egyptian cotton sateen or brushed microfiber sheets retain warmth and add a soft touch, ideal for chilly UK winters.
How to Maintain and Care for Your Bed Sheets

Washing and Drying Guidelines by Fabric Type
- Cotton: Machine wash at 40°C with gentle detergent.
- Egyptian Cotton: Wash inside out and avoid bleach to maintain softness.
- Microfiber: Wash cold and tumble dry low to preserve elasticity.
Preventing Shrinkage and Maintaining Elasticity
Avoid overheating during washing or drying. Pre-shrunk sheets from Dtex Homes help maintain perfect sizing even after multiple washes.
Ironing and Storage Tips
Iron on a medium setting while slightly damp for smoothness. Store in a cool, dry place away from direct sunlight to preserve color vibrancy.
When to Replace Your Bed Sheets
Replace bed sheets every 12–18 months, depending on usage and fabric type, to ensure hygiene and comfort.
Dtex Homes’ Care Recommendations for Long-Lasting Freshness
Always follow the care label and rotate your bedding sets regularly. For long-lasting freshness, explore premium bed sheets from Dtex Homes.
Dtex Homes Bed Sheet Size Chart (Quick Reference Table)
Mattress Size vs Fitted Sheet Size
| Bed Type | Mattress Size (cm) | Fitted Sheet Size (cm) |
|---|---|---|
| Single | 90 x 190 | 90 x 190 |
| Double | 137 x 190 | 137 x 190 |
| King | 152 x 200 | 152 x 200 |
| Super King | 183 x 200 | 183 x 200 |
Fitted Sheet Depth Comparison Chart
- Standard: 25–30 cm
- Deep: 30–35 cm
- Extra Deep: 40–46 cm
Bed Type vs Bedding Set Compatibility
Each bedding set from Dtex Homes includes fitted or flat sheets, duvet covers, and matching pillowcases tailored for all UK standard bed sizes.
Standard Pillowcase and Duvet Cover Dimensions
- Housewife Pillowcase: 50 x 75 cm
- Oxford Pillowcase: 50 x 75 cm (plus 5 cm border)
- Duvet Covers: Single 135 x 200 cm, Double 200 x 200 cm, King 225 x 220 cm, Super King 260 x 220 cm
Complete UK Bedding Measurement Chart (cm & Inches)
Visit our official UK Bedding Measurement Guide for a full list of updated sizes and compatibility information.
How to Pick the Right Bed Sheet – Step-by-Step Buying Guide
Step 1 – Measure Your Mattress Correctly
Use a tape measure to record your mattress’s length, width, and depth. Always account for toppers or protectors for the right fit.
Step 2 – Choose the Right Sheet Type
Select between fitted sheets for snugness or flat sheets for versatility depending on your preference.
Step 3 – Select the Ideal Fabric and Weave
Choose Egyptian cotton for luxury or microfiber for easy maintenance. A sateen weave offers softness while percale gives crisp coolness.
Step 4 – Match with Your Bedroom Style
Coordinate your bedding with duvet covers, curtains, and pillowcases for a cohesive look. Browse Dtex Homes Duvet Covers for inspiration.
Step 5 – Buy from Trusted UK Bedding Brands Like Dtex Homes
With years of experience and thousands of satisfied customers, Dtex Homes is your go-to UK bedding brand for comfort, style, and quality assurance.
Shop Luxury Bed Sheets Online at Dtex Homes
Explore Fitted, Flat, Deep-Fitted, and Valance Sheets
Whether you prefer fitted sheets for practicality or valance sheets for style, Dtex Homes offers a complete collection to suit every bedroom.
Find Sheets by Size – Single, Double, King, and Super King
Our sheets are perfectly tailored for all UK sizes with various depths, ensuring an exact fit for any mattress.
Discover High-Quality Egyptian Cotton and Microfiber Options
Experience ultimate softness with Egyptian cotton or enjoy easy-care microfiber sheets—crafted for long-lasting performance.
Why UK Customers Trust Dtex Homes for Premium Bedding
Trusted across the UK for excellence, Dtex Homes delivers premium-quality bedding with superior comfort, style, and affordability.
FAQ's
How do I know what size bed sheets I need?
Measure your mattress’s length, width, and depth in centimeters or inches, then match these measurements to a UK bedding size chart. Always include mattress toppers or protectors in your measurement.
How do I choose sheet size?
Choose a sheet size that exactly matches your mattress dimensions. For fitted sheets, check both the width and depth, while flat sheets should be slightly larger for proper tucking.
Should a fitted sheet be the same size as a mattress?
Yes, a fitted sheet should match your mattress size for a snug fit. If it’s too small, it will slip off, and if too large, it may bunch up and wrinkle.
How do I choose a fitted bedsheet size?
Measure your mattress depth carefully, including any topper, and select a fitted sheet with matching or slightly deeper corners to ensure a perfect fit.
Is it better to size up when getting bed sheets?
Generally, no—bed sheets should fit precisely. However, sizing up can help if your mattress has a thick topper or you prefer a looser flat sheet for easier tucking.