Choosing the right fitted-sheet size depends on two measurements, not just one. The mattress’s width and length determine the size, while the pocket depth ensures a secure fit. A properly sized fitted sheet hugs the mattress without wrinkles and does not come off during the night.
This guide reviews all standard sizes, from single beds to Super King-size beds, then explains how to choose the pocket depth based on your mattress thickness. Everything you need to find a fitted sheet that fits your bedding perfectly.
The two measurements that determine fitted-sheet size
A fitted sheet is defined by three measurements: width, length, and pocket depth. The first two correspond to the mattress dimensions. The third, often overlooked, determines how securely the sheet stays in place.
The basic rule is simple: a fitted sheet matches your mattress’s width and length exactly. For a 140 x 200 cm bed, you need a 140 x 200 cm fitted sheet. A model that is too large will bunch up, while one that is too small will come loose at the slightest movement.
Fitted-sheet size chart by bed type
Here are the corresponding mattress dimensions and fitted-sheet sizes for the most common bed sizes in France. Measure your mattress, then find the corresponding row.
| Bed type | Mattress dimensions | Fitted sheet |
|---|---|---|
| Single bed (child)occasional | 80 x 190 or 80 x 200 cm | 80 x 190 or 80 x 200 cm |
| Single bed | 90 x 190 or 90 x 200 cm | 90 x 190 or 90 x 200 cm |
| Three-quarter bed | 120 x 190 or 120 x 200 cm | 120 x 190 or 120 x 200 cm |
| Double bed (standard) | 140 x 190 or 140 x 200 cm | 140 x 190 or 140 x 200 cm |
| Queen-size bed | 160 x 200 cm | 160 x 200 cm |
| King-size bed | 180 x 200 cm | 180 x 200 cm |
| Super King-size bed | 200 x 200 or 200 x 220 cm | 200 x 200 or 200 x 220 cm |
Fitted sheet sizes by size
Each bed size has its own features. Here are the details to help you choose, taking your mattress’s actual length into account.
Fitted sheet for a single bed: 90 x 190 or 90 x 200 cm
A single fitted sheet fits mattresses measuring 90 x 190 cm or 90 x 200 cm. First check whether your bed is 190 or 200 cm long, as both lengths are available. A 25 to 30 cm pocket depth is sufficient for most of these mattresses.
Fitted sheet for a three-quarter bed: 120 x 190 or 120 x 200 cm
Ideal for someone who likes extra space, this size covers mattresses measuring 120 x 190 cm or 120 x 200 cm. Here again, the bed’s exact length determines the right choice. The pocket depth should be between 25 and 30 cm.
Fitted sheet for a double bed: 140 x 190 or 140 x 200 cm
This is the standard size for double beds in France, designed for two sleepers. It fits mattresses measuring 140 x 190 cm or 140 x 200 cm. If your mattress is thick or has a mattress topper, choose a deeper pocket for a perfect fit.
Fitted sheet for a queen-size bed: 160 x 200 cm
Wider than a standard double, the 160 x 200 cm queen size offers greater comfort for two. This size often requires a depth of 30 to 35 cm, as queen-size mattresses are frequently thicker. Make sure the fitted sheet fully covers the mattress.
Fitted sheet for a king-size bed: 180 x 200 cm
The 180 x 200 cm king size offers plenty of space for an undisturbed night's sleep. It requires a depth of 30 to 35 cm, or more depending on the mattress thickness. A sufficiently deep fitted sheet ensures it stays securely in place all night.
Fitted sheet for a super king-size bed: 200 x 200 or 200 x 220 cm
Reserved for luxury bedrooms and hotel suites, the super king size covers mattresses measuring 200 x 200 cm or 200 x 220 cm. These large sizes require an extra-deep fitted sheet, often 35 to 40 cm, for a perfect fit.
How to choose the fitted sheet depth
The depth refers to the height of the fitted sheet, namely the depth of the flaps that wrap around the sides of the mattress. This is what keeps the sheet in place. A sheet that is too shallow will not stay on, while one that is too deep will be loose and create wrinkles.
Why measure mattress thickness?
Standard mattresses measure between 18 and 27 cm thick. Some foam models are as thin as 12 cm, while high-end mattresses exceed 27 cm and can sometimes reach 40 cm. Before purchasing, measure the exact height of your mattress, including the topper if applicable.
Which depth to choose based on mattress thickness
Once you know the mattress thickness, the choice becomes obvious. Here are a few reliable guidelines:
- 25 cm depth: suitable for standard mattresses up to 22–23 cm thick;
- 30 cm depth: recommended for thick mattresses or those with a thin mattress topper;
- 40 cm depth: essential for very thick mattresses or mattress-and-topper combinations.
If you are unsure between two depths, always choose the larger one. A little extra depth can be tucked under the mattress without any problem, whereas a fitted sheet that is too shallow will come loose on the very first night.
Which material should you choose for your fitted sheet?
Once you have selected the size, the fabric is the next consideration, as it affects both comfort and durability. Cotton remains a reliable choice: breathable and easy to care for. Cotton percale has a cool, matte feel, while cotton sateen is known for its softness and subtle sheen.
Oeko-Tex-certified cotton Oeko-Tex guarantees fabric tested to be free from harmful substances—a true mark of quality. Discover our percale fitted sheets and cotton sateen fitted sheets, available in all standard sizes.
Fitted sheet, flat sheet, duvet cover: view the full collection
A fitted sheet is only one piece of a bedding set. To fully dress your bed, the flat sheet and duvet cover should also be chosen according to the mattress and duvet. Our bedding size guide summarizes all the dimensions, and our dedicated guides provide details on duvet cover sizes as well as pillowcase sizes.
Your questions about fitted sheet sizes
What size fitted sheet for a 160x200 bed?
For a 160 x 200 cm Queen Size bed, the fitted sheet measures exactly 160 x 200 cm. Allow for a 30 to 35 cm pocket depth, as mattresses of this size are often thicker.
Which pocket depth should you choose for a 25 cm mattress?
For a 25 cm mattress, a 30 cm pocket depth is ideal. It fits around the mattress with a small margin that keeps the sheet in place without making it too loose.
What happens if the pocket is too small?
A pocket that is too short will not fully cover the mattress. The fitted sheet comes loose at the corners during the night and forms uncomfortable wrinkles. It is always better to choose a pocket that is slightly larger rather than too tight.
How do you measure a fitted sheet?
Measure the width and length of your mattress, then its height, including the mattress topper. The fitted sheet should match the width and length exactly, with a pocket depth equal to or greater than the measured thickness.
How can you prevent a fitted sheet from shrinking?
Wash your fitted sheet at 40°C and avoid high-temperature tumble drying, which causes the fibers to shrink. High-quality cotton, washed gently, retains its dimensions and fit wash after wash.