Changing a crib sheet has never been easier. Four products in one, the Ultimate Crib Sheet are a quick change sheet, mattress pad, super absorbent pad, and a waterproof pad. It attaches to the crib by ten elastic straps to ensure a safe night's sleep for baby. No need to remove bumper or lift mattress to change the sheet. Product Dimensions: 52 x 28 x 0.2 inches