Fit Guide
Sleep & Beyond Mattress Protector Sizes & Fit Guide
Fit problems can make an otherwise good protector frustrating. The maker states that non-crib sizes fit mattresses up to 18 inches deep and the crib version fits up to 6 inches.
Published dimensions
| Size | Dimensions |
|---|---|
| Crib | 28 × 52 in |
| Twin | 38 × 76 in |
| Twin XL / Split King | 39 × 81 in |
| Full | 54 × 76 in |
| Queen | 60 × 80 in |
| King | 76 × 80 in |
| California King | 72 × 84 in |
| Split California King | 37 × 84 in |
Measure the whole stack
Add mattress depth and any permanent topper. A fitted protector has to clear the total stack without pulling the corners upward.
Why it may look oversized
Sleep & Beyond says it intentionally oversizes the protector to account for organic-cotton shrinkage. Pre-washing is part of its fit guidance rather than an afterthought.
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