Bear in mind: mattress sizes are largely uniform across the ... This should be the correct size for your baby's cot/crib, so it fits perfectly and there are no dangerous or uncomfortable gaps.

No matter what crib mattress you end up with, here are some basic tips to help keep your baby safe and your mattress in good condition. Brandon Boor, PhD, assistant professor of civil engineering ...

Once you choose your mattress and put it in your crib, it should be covered with a fitted sheet only — no blankets, pillows, or lovies, for example. In fact, your baby, placed on his or her back ...