Question: is a crib mattress the same size as a pack n play?
Answer: A mattress for Graco Pack n Play measures usually between 1-3 inches thick. The mattress is 25.5” wide and 37.5” long. This is very different from a crib mattress which may be as much as 6” thick, with most being around 5”. The standard crib is also 27 1/4” wide and 51 5/8” long.