This Two-Pack of Mini Crib Jersey Fitted Sheets from cloud island™ fits mini crib sized mattresses. Made from 100% cotton jersey fabric, these mini crib sheets fit a three-inch mattress, and come with an all-around elastic design to make them easy to secure over the mattress corners. This mini crib sheet set includes two sheets — one in a solid gray hue and the other featuring gray stars on a white background — to lend sweet charm to your little one's nursery decor.cloud island™: Designed with love. Made without compromise.