While American mattress sizes have remain fixed for decades, mattress depths have fluctuated in recent years. As a rule, all our fitted sheets will fit mattresses up to 17" deep (referred to as pocket size or pocket depth) with enough room to tuck under the mattress. Fitted sheets for deeper or thinner mattresses are easily custom ordered.
Each bedding designer creates their own sizing specifications that adhere, generally, to the sizes, in inches, in this chart:
| BED SIZE | Mattress Size | Flat Sheet | Duvet Cover | Coverlets |
| Twin | 39 x 75 | 72 x 110 | 70 x 90 | 70 x 90 |
| Twin Extra-Long | 39 x 80 | 72 x 115 | 70 x 90 | 70 x 90 |
| Double (Full) | 54 x 75 | 81 x 110 | 82 x 90 | 82 x 90 |
| Queen | 60 x 80 | 90 x 110 | 88 x 92 | 90 x 95 |
| California King | 72 x 84 | 108 x 115 | 106 x 92 | 108 x 95 |
| Eastern King | 78 x 80 | 108 x 115 | 106 x 92 | 108 x 95 |