The crib should have a firm mattress with less than an inch between the mattress and the sides of the crib. The spaces between the bars of the crib should be no greater than 2 3/8 inches.

Always put the crib railing all the way up when leaving your baby in her crib. The crib should allow for the mattress to be lowered as the baby gets taller, so that she cannot climb over the railing.