LOL, I had no idea!
| USA Mattress Sizes | Width Centimeters | Length Centimeters | Width Inches |
Length Inches |
|---|---|---|---|---|
| USA Twin | 99 | 188 | 39 | 74 |
| USA Twin XL | 99 | 203 | 39 | 80 |
| USA Full or Double | 137 | 188 | 54 | 74 |
| USA Full XL | 137 | 203 | 54 | 80 |
| USA (RV) Full | 135 | 190 | 53 | 75 |
| USA Queen | 152 | 203 | 60 | 80 |
| USA Olympic Queen | 168 | 203 | 66 | 80 |
| USA California Queen | 152 | 213 | 60 | 84 |
| USA Short Queen (RV) | 152 | 190 | 60 | 75 |
| USA King | 193 | 203 | 76 | 80 |
| USA California King | 183 | 213 | 72 | 84 |