An AAP spokesperson told us that the organization “does ... inside and covering the mattress. I fit each mattress into a standard-size IKEA crib to make sure it fit the crib appropriately ...

In the US, the standard size of a crib mattress is 27.5 x 52 inches (70 x 132cm). In the UK, there are two standard sizes for cot mattresses, namely, standard UK cot bed mattress size is 70cm x ...

The best fitted crib sheets for baby include percale, jersey, GOTS certified organic cotton and breathable muslin fabrics ...