Product Information
📝 Product Details
Designed for mattresses that need a little more room around the sides, our 400 Thread Count 40cm Extra Deep Fitted Sheet combines a generous fitted depth with a smooth, soft finish for everyday comfort.
Made from 100% super soft microfibre, this plain fitted sheet has a 400 thread count specification and a 40cm extra deep pocket. Choose from White or Grey in Single, Double, King and Super King sizes.
40cm Extra Deep Fitted Sheet for Deeper Mattresses
When a fitted sheet is too shallow for the mattress, the corners can feel overly stretched or work loose during use. A 40cm fitted depth provides additional fabric around the sides, making this sheet suitable for deeper mattresses that need more coverage.
The 40cm pocket is approximately 16 inches deep. Before ordering, measure your mattress from the top sleeping surface to the bottom edge rather than relying only on the bed-size name.
If you regularly use a mattress topper underneath your fitted sheet, include the topper when measuring the overall depth.
400 Thread Count Soft Microfibre
This fitted sheet is made from 100% super soft microfibre with a 400 thread count specification. The fabric has a smooth plain appearance that is easy to pair with patterned duvet covers, neutral bedding and different bedroom styles.
Rather than choosing a sheet on thread count alone, it is worth considering the complete fit: mattress size, depth, fabric and the finish you prefer.
Extra Deep Fitted Sheet Sizes
This 40cm deep fitted sheet is available across popular UK bed sizes. Check both the width and length of your mattress as well as its depth before choosing your size.
| Bed Size | Sheet Dimensions | Fitted Depth |
|---|---|---|
| Single | 91 x 193cm | 40cm |
| Double | 137 x 193cm | 40cm |
| King | 152 x 203cm | 40cm |
| Super King | 183 x 203cm | 40cm |
40cm Deep King Size Fitted Sheet
The King option measures 152 x 203cm with a 40cm fitted depth. It provides the dimensions required for a UK King mattress together with a deeper pocket for mattresses that need more room around the sides.
Always measure the mattress depth before ordering, particularly if you use a mattress topper or have a thicker mattress construction.
Double and Super King Extra Deep Options
The Double option measures 137 x 193cm, while the Super King measures 183 x 203cm. Both feature the same generous 40cm fitted depth.
This lets you choose the correct width and length for your bed without compromising on the deeper pocket required by your mattress.
White or Grey Fitted Sheets
Choose from two versatile bedroom colours.
White gives the bed a clean, fresh appearance that works particularly well with hotel-inspired or neutral bedding. Grey offers a softer contemporary look and coordinates easily with both light and darker bedroom colour schemes.
Is a 40cm Fitted Sheet Right for Your Mattress?
The easiest way to decide is to measure your mattress.
Measure vertically from the top of the mattress to the bottom edge. If a mattress topper sits permanently beneath the fitted sheet, measure the mattress and topper together.
A 40cm sheet is designed to give deeper mattresses additional side coverage. If your mattress does not require this much depth, you may get a neater fit from one of our 30cm deep fitted sheets.
30cm or 40cm Fitted Sheet?
The main difference is the fitted pocket depth.
A 30cm fitted sheet is designed for mattresses suited to an approximately 12-inch pocket, while this product provides a more generous 40cm / approximately 16-inch depth.
Rather than choosing the deepest option automatically, measure your mattress and select a sheet that gives you enough coverage without leaving unnecessary loose fabric around the sides.
Complete Your Bedding
The simple plain finish makes this fitted sheet easy to coordinate with the bedding you already own.
Explore our full fitted sheets range for more depths and styles, or browse our 40cm extra deep fitted sheets collection for other options designed for deeper mattresses.
✨ Key Features
- Material: 100% super soft microfibre
- Thread Count: 400 TC
- Fitted Depth: 40cm / approximately 16 inches
- Design: Plain extra deep fitted sheet
- Sizes: Single, Double, King and Super King
- Colours: White and Grey
- Suitable for: Deeper mattresses requiring a more generous fitted pocket
🏆 Size, Material & Care
Material: 100% super soft microfibre
Thread Count: 400 TC
Fitted Depth: 40cm / approximately 16 inches
| Size | Dimensions | Depth |
|---|---|---|
| Single | 91 x 193cm | 40cm |
| Double | 137 x 193cm | 40cm |
| King | 152 x 203cm | 40cm |
| Super King | 183 x 203cm | 40cm |
Available colours: White and Grey.
Care: Machine wash according to the product care label. Wash similar colours together and avoid harsh bleaching products to help maintain the appearance of the fabric.
💚 Why You’ll Love It
A deeper mattress needs a fitted sheet with enough room to sit comfortably around the sides. The 40cm extra deep pocket provides generous coverage, while the 100% super soft microfibre creates a smooth and comfortable surface for everyday bedding.
The plain White and Grey colour options are easy to coordinate with existing duvet covers and pillows, making this a practical choice when you want a neat bed without changing your entire bedding scheme.