Bedding products in the U.S. are standardized, meaning that their sizes comply to industry or traditional standards. This is a good thing, because you don't have to measure everything individually to make sure they fit together.
For example, if you buy a Queen sized bed, matress and fitted sheet from three different stores, they should fit just fine. However, some brands or models may be slightly off from standard sizes, and certain dimensions (like matress thickness) can vary quite a bit from manufacturer to manufacturer. So it is always a good practice to double check the sizes before you go shopping.
Below is a table containing typical sizes for mattresses, sheets and pillows sold in the United States:
| U.S. Standard Bedding | Mattress Sizes | Fitted Sheet Sizes | Flat Sheet Sizes | Pillow Sizes | ||
| Bed | Type | (inch) | (cm) | (inch) | (inch) | (inch) |
| Crib | Toddler | 27.25 x 51.6 | 69 x 131 | 27.25 x 51.6 | ||
| Twin | Single | 39 x 75 | 99 x 191 | 39 x 75 | 66 x 96 | 20 x 26 (standard) |
| Twin XL | Single | 39 x 80 | 99 x 203 | 66 x 102 | ||
| Full | Double | 54 x 75 | 137 x 191 | 54 x 75 | 81 x 96~100 | |
| Full XL | Double | 54 x 80 | 137 x 203 | |||
| Queen | Double | 60 x 80 | 152 x 203 | 60 x 80 | 90 x 102~106 | 20 x 30 |
| King | Double | 76 x 80 | 193 x 203 | 76 x 80 | 109 x 102~106 | 20 x 36 |
| California King | Double | 72 x 84 | 183 x 213 | 72 x 84 | 102 x 110 | 20 x 36 |
1 inch = 2.54 cm
Mattress Size Comparision: Each rectangle represents the size and shape of a standard mattress.