The standard full size crib mattress is 27 inches by 52 inches.
Standard crib size height.
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.
Given frequent falls from the crib federal crib regulations have set the minimum distance between the top of the mattress support and top of the crib side rail as 26 in.
28 x 52 3 8 inches plus or minus around 5 8 inch.
According to u s regulations a standard full size crib is 30 inches wide and 54 inches long.
A standard crib mattress is 52 by 28 inches.
The crib s adjustable height mattress support that can be lowered as your baby begins to sit or stand plus it effortlessly adapts from crib to toddler bed daybed sofa and full size bed with or without a footboard daybed sofa rail and toddler guardrail.
Standard crib mattress dimensions.
Top of crib mattress to top of side rail.
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.
Crib height off floor floor to bottom of mattress support.
When a mattress is used with the crib the actual height of the crib side as a barrier is 20 in.
27 1 4 x 52 inches and not more than 6 inches thick usually thinner standard full size crib dimensions interior.
And this height must include a 6 in.