Futon Mattress Sizes
| Size | Inches | Centimeters |
| Twin | 38" x 75" | 97 cm x 191 cm |
| Twin XL | 38" x 80" | 97 cm x 203 cm |
| Double | 54" x 75" | 137 cm x 191 cm |
| Queen | 60" x 80" | 152 cm x 203 cm |
| King | NA | NA |
Due to the inexact nature of cotton batting, all sizing is +/- 2" or 5 cm. Futons compact out under normal use, and the initial tufted size can be even smaller.