To prevent head entrapment and suffocation between the mattress and crib sides a mattress used in a full size crib must be at least 27 1 4 inches x 51 1 4 inches with a thickness not exceeding 6 inches.
Baby bed size standard.
A standard size crib mattress is a baby crib mattress with the following measurements.
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.
But what are the dimensions of a crib.
The full size baby crib standard currently incorporates astm f1169 19 standard consumer safety specification for full size baby cribs approved on march 15 2019 as the mandatory cpsc standard.
And what is a crib called in other languages and what are the dimensions there.
Crib bed dimensions mattress size crib is the american word for a infant bed.
52 3 8 5 8 inches in length by 28 5 8 inches in width any new full size crib mattress fits into any new standard size baby crib.
Although there are usually no problems with fitting there is a bit of wiggle room within the regulations.
Just make sure you choose a firm and safe mattress for the crib.
The crib standards.
Astm f1169 19 specifies performance requirements and test procedures to determine the structural integrity of full size cribs.