Baby Crib Mattress Size. Skip to main content skip to footer. Choose a mattress designed for the crib size.
A baby crib mattress is usually between 4 and 6 inches thick. Before buying make sure that the size of the mini crib mattress matches the internal dimensions of your mini crib. Standard baby crib mattresses are not all sized identically but instead range in width from 27 5 8 inches to 28 5 8 inches and range in length from 51 3 4 inches to 53 inches.
It s essential that the crib mattress fits snugly.
The consumer products safety commission defines the standard size for a full size baby crib as 28 inches wide by 52 3 8 inches long plus or minus 5 8 inch for both width and length 2 5 at a minimum the mattress should be 27 1 4 inches wide by 51 1 4 inches long and it should be no thicker than 6 inches. Milliard hypoallergenic baby crib mattress or toddler bed mattress with waterproof cover 27 5 inches x 52 inches x 4 75 inches. Before buying make sure that the size of the mini crib mattress matches the internal dimensions of your mini crib. A standard size crib is a baby crib with the following measurements.