Sleep Well For Less - Last Chance
If your fitted sheet keeps popping off the corners overnight, the mattress is almost certainly too deep for the sheet's elasticated pocket. A deep fitted sheet has a deeper pocket - typically 40cm or more - designed to grip a thicker mattress, a mattress with a topper on top, or any setup where the combined depth exceeds what a standard sheet can hold. Our deep fitted sheet range covers cotton sateen options in a choice of colours across all standard UK sizes. Free delivery on orders over £100 and expert advice seven days a week.
Browse the full deep fitted sheet range below, or speak to our team if you are unsure which depth you need. We are available seven days a week on 01928 242829.
A fitted sheet has an elasticated border that grips the underside of the mattress to hold it in place. The pocket depth - the measurement from the top of the mattress surface to the bottom of the sheet - determines how thick a mattress the sheet can accommodate. Standard fitted sheets have a pocket depth of around 25 to 30cm. Most mattresses fall within this range.
The problem arises in two common situations. The first is a particularly deep mattress - some premium divan and pocket spring mattresses exceed 30cm in depth, and a standard sheet simply does not have enough material to wrap around the base securely. The second is a mattress with a topper. A mattress that is 25cm deep with a 7cm topper on top is now 32cm deep. A standard sheet that fitted perfectly before the topper was added will now pop off the corners.
A deep fitted sheet addresses this by providing a deeper pocket - typically 40cm or more - with stronger elastication around the full perimeter rather than just at the corners. The result is a sheet that holds in place regardless of how many times someone moves during the night.
Before ordering, measure the depth of your mattress from top to bottom. If you use a topper, add the topper depth to that figure. Order a sheet whose pocket depth comfortably exceeds the combined measurement. Check the individual product listing for the exact pocket depth specification.
| Situation | Sheet Depth Needed |
|---|---|
| Mattress up to 30cm deep, no topper | Standard fitted sheet - no deep sheet needed |
| Mattress 30 to 40cm deep, no topper | Deep fitted sheet with at least 40cm pocket depth |
| Standard mattress with a topper (combined 30 to 40cm) | Deep fitted sheet with at least 40cm pocket depth |
| Very deep mattress or thick topper (combined over 40cm) | Extra deep fitted sheet - check individual product pocket depth specification |
If you are unsure of your mattress depth, measure from the top surface to the underside of the base before ordering. Our team can help if you are not sure which depth is right - call 01928 242829.
Getting the measurement right before ordering saves a frustrating return. Here is how to do it accurately.
| Step | What to Do |
|---|---|
| 1 - Measure mattress depth | Measure from the top of the mattress surface to the underside of the base. Do this on the side of the mattress, not at the corner. |
| 2 - Add topper depth | If you use a mattress topper, measure its depth and add it to the mattress depth. A 25cm mattress with a 10cm topper requires a sheet that can accommodate at least 35cm. |
| 3 - Add clearance | Add a further 5 to 8cm to allow the sheet to grip underneath the mattress. A sheet that exactly matches the combined depth will grip loosely and may still slip. |
| 4 - Check the product spec | Confirm the pocket depth on the individual product listing before ordering. This is usually stated in the product description. |
The deep fitted sheets in our range are available in cotton sateen weave. Here is what that means for everyday use.
| Feature | Detail |
|---|---|
| Cotton sateen weave | More of the thread is exposed on the top surface, creating a smooth, slightly lustrous finish. Softer against the skin than a plain cotton weave. |
| Thread count | Varies across the range - higher thread counts provide a softer, denser surface. Check the individual product listing for the specific thread count. |
| Care | Machine washable - check the individual product care label for the recommended temperature. Lower temperatures preserve the sateen finish better over time. |
| Improves with washing | Cotton sateen sheets become softer and more supple with each wash rather than deteriorating. |
Deep fitted sheets are available across all standard UK sizes. The sheet size must match your mattress - the pocket depth then determines whether it accommodates your mattress depth.
| Size | Mattress Surface Dimensions | Notes |
|---|---|---|
| Single (3ft) | 90 x 190cm | Check pocket depth against your mattress and topper combined |
| Small Double (4ft) | 120 x 190cm | Check pocket depth against your mattress and topper combined |
| Double (4ft 6) | 135 x 190cm | Check pocket depth against your mattress and topper combined |
| King Size (5ft) | 150 x 200cm | Check pocket depth against your mattress and topper combined |
| Super King (6ft) | 180 x 200cm | Check pocket depth against your mattress and topper combined |
| Item | Included? |
|---|---|
| Deep fitted sheet | Yes - always |
| Pillowcases | No - sold separately. Browse our pillowcases. |
| Duvet cover | No - sold separately. Browse our duvet cover sets. |
Always check the individual product listing for pocket depth specification, available sizes, and care instructions before purchasing.
| What We Offer | Why It Matters to You |
|---|---|
| 50+ years of expertise | Honest advice on which pocket depth suits your specific mattress and topper combination |
| Cotton sateen deep sheets | A softer, smoother sleeping surface that holds its quality wash after wash |
| All standard UK sizes | Single through to super king - use the quick links above to filter by size |
| Free UK delivery on orders over £100 | No hidden delivery charges on the vast majority of orders. Some remote postcodes may incur a surcharge - see our delivery page for details. |
| Price Promise Guarantee | We'll match any like-for-like price you find elsewhere |
| Interest-free finance available | Spread the cost on eligible orders - see our finance page for terms |
| Expert advice, 7 days a week | Real people via phone, chat, or in-store - no scripts, no pressure |
| Rated Excellent on Trustpilot | Real feedback from verified customers across thousands of orders |
Not sure which pocket depth suits your mattress and topper setup? Our team can help you measure and choose correctly. Chat online, call us, or visit our showrooms in Cheshire and Greater Manchester. We're open seven days a week.
| How to Reach Us | What to Expect |
|---|---|
| Live chat | Fast responses for quick questions. Available during opening hours. |
| Phone - 01928 242829 | Speak directly with an expert. Best for checking whether your mattress and topper combination needs a deep or standard sheet. |
| In-store (Cheshire / Greater Manchester) | See bedding options in person. See our store locations. |
| Help Centre | Buying guides and FAQs available 24/7. Visit our help and advice section. |
| Question | Answer |
|---|---|
| Why does my fitted sheet keep popping off? | Almost always because the sheet's pocket depth is shallower than your mattress is deep. A standard fitted sheet is designed for mattresses up to around 25 to 30cm. If your mattress is deeper than this, or if you use a mattress topper that takes the combined depth over this, a standard sheet will not grip the underside of the mattress securely. A deep fitted sheet with a deeper elasticated pocket solves this. |
| What is the difference between a standard and a deep fitted sheet? | The pocket depth - the amount of fabric that wraps underneath the mattress. A standard sheet has a pocket of around 25 to 30cm. A deep sheet has a pocket of 40cm or more, and usually has stronger elastication around the full perimeter rather than just at the corners. |
| How do I know which pocket depth I need? | Measure your mattress depth from top to bottom. Add your topper depth if you use one. Add 5 to 8cm of clearance for the sheet to grip properly underneath. That total figure should be less than the sheet's stated pocket depth. Check the pocket depth specification on the individual product listing before ordering. |
| Can I use a deep fitted sheet on a standard mattress? | Yes. A deep sheet on a standard-depth mattress will have some excess fabric at the sides that tucks underneath. It will stay on more securely than a standard sheet, but will not look quite as neat. It is not ideal but it will function correctly. |
| Do I need a deep sheet if I use a mattress topper? | It depends on the combined depth. Measure your mattress and add the topper depth. If the total exceeds 30cm, a deep fitted sheet is recommended. Many people find that adding a topper to an existing mattress is exactly when their current sheet starts slipping - this is why. |
| What size deep fitted sheet do I need? | The sheet surface size must match your mattress - double for a double mattress, king size for a king size mattress, and so on. The pocket depth is a separate specification that must also be checked against your mattress depth. Both need to be correct for the sheet to fit properly. |
| Do you offer free delivery on deep fitted sheets? | Free UK delivery is included on orders over £100. Individual sheet products may fall below this threshold - check the individual listing for delivery charges. Some remote postcodes may incur an additional charge. See our delivery page for full details. |
| Can I buy deep fitted sheets on finance? | Yes. Interest-free finance is available on eligible orders. See our finance page for full details on terms, eligibility, and how to apply. |
