Standard Baby Crib Dimensions

Top of crib mattress to top of side rail.

Standard baby crib dimensions. Due to different materials frame designs and style the external dimensions of standard size baby cribs can vary by a few inches even if they belong to the same crib type. Cribs are commonly rectangular in shape with a small mattress placed at the bottom. Crib height off floor floor to bottom of mattress support. For cribs manufactured before june 28 2011 when new retroactive safety regulations were issued for full size cribs unless the seller has written proof that the crib meets the standard above retailers should destroy any full size crib with or without drop sides and should not resell it.

A standard crib mattress is 52 by 28 inches. Standard crib mattress dimensions. Internal dimensions of standard size baby cribs are regulated by the government so they are approximately the same for all full size cribs all standard size crib mattresses fit into all standard size cribs. Since the early 20th century cribs have been enclosed and elevated from the ground to protect an infant from the elements.

According to u s regulations a standard full size crib is 30 inches wide and 54 inches long. According to the consumer products safety commission a standard or regular crib mattress should be no more than 6 inches thick and measure at least 27 1 4 inches wide and 51 1 4 inches long. 28 x 52 3 8 inches plus or minus around 5 8 inch. The adjustable railing must be 26 inches above the bottom mattress at its maximum height and 9 inches above the mattress support at its lowest.