Extra-Deep Fitted Sheets Guide: How to Choose the Best Sheets for Deep and Thick Mattresses
Introduction: Why Extra-Deep Fitted Sheets Matter
Have you ever woken up to find one corner of your fitted sheet has pinged off your mattress again? It’s frustrating, uncomfortable, and ruins the look of your bed. The truth is simple: most standard fitted sheets were never designed for today’s mattresses.
With the rise of memory foam, pillow-top designs, hybrid mattresses, and luxurious toppers, beds are now deeper than ever before. That means the old standard sheets just don’t fit.
This is where extra-deep fitted sheets step in. These specially designed sheets solve the problem by covering mattresses up to 35cm deep and staying snug throughout the night.
In this definitive guide, you’ll learn:
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Exactly what extra-deep fitted sheets are and how they differ from regular sheets
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Why they’re essential for thick and luxury mattresses
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How to measure your bed for the perfect fit
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The best fabrics to choose, from Egyptian cotton to Coolmax®
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Styling tips for that polished, hotel-quality look
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FAQs answered in plain, voice-search style
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And most importantly—where to buy sheets that actually fit
By the end, you’ll know everything there is to know about extra-deep fitted sheets—and you’ll never fight with your bedding again.
What Are Extra-Deep Fitted Sheets?
Extra-deep fitted sheets are specially made for mattresses that exceed the standard 25cm depth. While traditional fitted sheets can manage average mattresses, they struggle with anything taller. An extra-deep sheet solves this by providing additional fabric depth, reinforced corners, and elastic strong enough to hug even the thickest beds.
Key differences compared to regular fitted sheets:
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Depth: Standard sheets fit up to ~25cm, deep fit up to ~30cm, and extra-deep up to ~35cm or more.
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Elastic: Higher quality elastic runs the full perimeter to ensure a secure grip.
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Durability: Designed to withstand stretching without seam stress.
If you’ve invested in a quality mattress or topper, extra-deep fitted sheets aren’t a luxury—they’re a necessity.
Why Extra-Deep Fitted Sheets Are Essential
Why go beyond standard bedding? Here are the key benefits:
1. Perfect Fit Every Time
No more sheets slipping off at 2am. Extra-deep sheets cover the mattress fully, with enough tuck to stay in place.
2. Extended Sheet Life
When sheets are too tight, seams weaken and fabric tears. Extra depth reduces this strain, making your bedding last longer.
3. Better Sleep Quality
A smooth, wrinkle-free surface eliminates discomfort. You’ll enjoy uninterrupted rest without constantly adjusting corners.
4. Hotel-Style Look
Extra-deep fitted sheets give your bed a tailored finish—crisp, clean, and luxurious.
5. Future-Proof Bedding
Mattresses are getting taller each year. Buying extra-deep fitted sheets ensures you’re ready if you upgrade or add a topper.
How to Measure Your Mattress Depth
Before buying, measure your mattress properly:
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Place a tape measure at the base of your mattress.
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Measure up to the very top surface—including any topper.
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Write down the measurement in centimetres.
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Add 2–3cm to allow for shrinkage and fabric give.
Example: A mattress that measures 32cm deep will need a 35cm extra-deep fitted sheet.
👉 Pro Tip: Always round up, never down. Elastic will pull the sheet snug, but too little depth won’t stretch safely.
Choosing the Right Fabric
Depth solves the fit issue, but fabric determines comfort. Let’s explore your best options.
Egyptian Cotton
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Known as the gold standard of bedding
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Long, silky fibres make it breathable and durable
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Crisp, cool, and softens over time
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Available in thread counts from 200 to 1000
Polycotton Percale
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Blend of cotton and polyester
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Easy-care, less ironing required
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Affordable and long-lasting
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Feels crisp, perfect for guest rooms or busy households
Jersey Cotton
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Naturally stretchy, like a favourite T-shirt
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Great for adjustable or electric beds
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Fits snugly even on unusual mattress shapes
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Warm, cosy feel
Coolmax®
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Advanced performance fabric
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Designed to regulate temperature
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Wicks away moisture for hot sleepers
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Perfect for summer or those prone to night sweats
When choosing fabric, think about whether you prioritise luxury, ease of care, stretch, or cooling performance.
Thread Count: What It Really Means
Thread count is often misunderstood. It refers to the number of threads woven into a square inch of fabric. Higher isn’t always better—balance is key.
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200 TC: Light, breathable, everyday use
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400 TC: Hotel standard—luxurious yet durable
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600–1000 TC: Ultra-luxury, denser weave, heavier fabric
For most people, 400 TC Egyptian cotton extra-deep fitted sheets strike the perfect balance of softness and strength.
Styling Tips for Extra-Deep Fitted Sheets
Want that hotel look? Here’s how to achieve it:
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Choose neutral colours like white, ivory, or silver for timeless style
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Pair with a matching flat sheet and pillowcases for layering
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Smooth corners with the “hospital tuck” method
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Add a quilted bedspread or throw for texture
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Use scatter cushions to finish the look
Remember, your fitted sheet is the foundation of the bed. When it fits properly, everything else looks sharper.
Common Problems and Solutions
Problem: Sheets still slip off
Solution: Check if your mattress depth was measured correctly. Always size up.
Problem: Fabric feels rough
Solution: Wash new sheets a couple of times to soften. Choose higher thread counts for smoother feel.
Problem: Hard to put on
Solution: Lift corners of the mattress one by one instead of wrestling the whole thing at once.
Problem: Heat build-up
Solution: Switch to breathable fabrics like Egyptian cotton or cooling options like Coolmax®.
FAQs: Quick Answers
Q: How deep is “extra-deep”?
A: Generally 30–35cm, compared to standard 25cm sheets.
Q: Can I use extra-deep sheets on a regular mattress?
A: Yes. Elastic keeps them snug even on thinner mattresses.
Q: Do they shrink in the wash?
A: Quality fabrics like Egyptian cotton shrink minimally—always buy with 1–2cm allowance.
Q: Are they worth the extra money?
A: Absolutely. They last longer, fit better, and improve both comfort and appearance.
Q: Are they good for electric beds?
A: Jersey cotton extra-deep fitted sheets are ideal thanks to their natural stretch.
Where to Buy Extra-Deep Fitted Sheets
Not all extra-deep sheets are created equal. Some are poorly made and lose elasticity after a few washes. That’s why it’s important to buy from a trusted specialist.
At Bedlinen Direct, we’ve curated a collection of high-quality extra-deep fitted sheets to fit mattresses up to 35cm. Our range includes Egyptian cotton, polycotton, jersey cotton, and Coolmax®—all designed for the perfect fit and lasting performance.
👉 Explore the full collection here: Extra-Deep Fitted Sheets at Bedlinen Direct
Conclusion: Invest in the Right Fit
If you’re constantly fighting with sheets that won’t stay put, the solution is simple: upgrade to extra-deep fitted sheets. They protect your mattress, improve comfort, and give your bedroom a polished finish.
Take the time to measure your mattress, choose the right depth and fabric, and invest in bedding that truly fits your lifestyle. Once you switch, you’ll never go back to standard sheets.
Shop our full range today:
Extra-Deep Fitted Sheets at Bedlinen Direct
