These are standard sizes in Canada and the United States. Standard sizes in other countries varies. These measurements are useful when building beds.
| Size | Width | Length |
|---|---|---|
| Crib | 28 in (71 cm) | 52 in (133 cm) |
| Small Single, Cot | 30 in (76 cm) | 75 in (191 cm) |
| Twin, Single, Bunk | 39 in (99 cm) | 75 in (191 cm) |
| Extra-Long Twin | 39 in (99 cm) | 80 in (203 cm) |
| Full, Double | 54 in (137 cm) | 75 in (191 cm) |
| Extra-Long Full, Extra-Long Double | 54 in (137 cm) | 80 in (203 cm) |
| Queen | 60 in (152 cm) | 80 in (203 cm) |
| Expanded Queen, Super Queen, Olympic Queen | 66 in (168 cm) | 80 in (203 cm) |
| King | 76 in (193 cm) | 80 in (203 cm) |
| California King, Long King | 72 in (183 cm) | 84 in (213 cm) |