The standard size Naturepedic crib mattresses tend to run a little too big for Pottery Barn cribs, including the Kendall crib (a Leaf Score recommended product). Naturepedic offers a special crib mattress designed to fit Pottery Barn cribs (the MC34Y), so check with your local Pottery Barn if you’d like to order one of these. Also, because Naturepedic’s innerspring crib mattresses have firm edge support (which you want!), they aren’t a good fit for certain cribs, such as the Baby Appleseed Chelmsford crib. The edge supports mean the mattress won’t squeeze into the lower setting of this type of crib, meaning the crib and mattress combination will only work on the top setting.