Bed Sheet Size Converter

Bed Sheet Size Converter

Find the perfect bed sheet size for your mattress. Compare global standards.

Size Converter

Select your current size and system

Converted Sizes

Select a size to see dimensions

Reference Table

Complete size conversion chart
Size NameMattress (cm)Fitted Sheet (cm)Flat Sheet (cm)
Twin99 x 191 99 x 191 168 x 244
Twin XL99 x 203 99 x 203 168 x 244
Full / Double137 x 191 137 x 191 206 x 244
Queen152 x 203 152 x 203 229 x 259
King193 x 203 193 x 203 274 x 259
California King183 x 213 183 x 213 259 x 264

Frequently Asked Questions

Why Do My Fitted Sheets Keep Popping Off?

It's not just you. The number one reason fitted sheets slip is Pocket Depth. If you buy a standard sheet for a modern, thick mattress, it will never stay put.

📐 The "Pop-Off" Problem: Pocket Depth

Mattress
Measure This!
(Depth)
Elastic

Sheets pop off for one reason: Pocket Depth. Standard sheets fit 12" mattresses. If you have a pillow-top, you need "Deep Pocket" sheets.

Standard Depth7" - 12"
Deep Pocket13" - 17"
Extra Deep18" - 25"
Rule of Thumb: Buy sheets at least 2 inches deeper than your mattress height.

Fabric Matters: Percale vs. Sateen

WeaveFeelBest For
PercaleCrisp, cool, matte (like a dress shirt)Hot sleepers
SateenSilky, smooth, subtle sheenCold sleepers / Winter
LinenTextured, breathable, softens with timeAll seasons (moisture wicking)