Standard mattress sizes varies from country to country and usually the standard bed sizes are based on standard mattress size.
Not only sizes but dimensions and names may vary from country to country. Here is the list of some popular bed and mattress sizes
| Size | Inches | Centimeters |
|---|---|---|
| Twin or Single | 38.5 × 74.5 | 98 × 189 |
| Twin XL | 38.5 × 79.5 | 98 × 202 |
| Full or Double | 53.5 × 74.5 | 136 × 189 |
| Queen | 60 × 79.5 | 152 × 202 |
| King | 76 × 79.5 | 193 × 202 |
| California King | 72 × 83.5 | 183 × 212 |
| Size | Dimensions |
| Twin | 38″ X 75″ |
| Twin XL | 38″ X 80″ |
| Full | 54″ X 74″ |
| Queen | 60″ X 80″ |
| King | 76″ X 80″ |
| California King | 72″ X 84″ |