How cute is this fitted sheet with adorable Miffy print? A fitted sheet also protects the cot mattress. For the best protection, you should use this jersey fitted sheet on top of a thicker flannel fitted sheet. The fitted sheet has elastics, so it will stay in place around the mattress. Looking for a fitted sheet for the crib? Jollein has those too! Take a look at our crib fitted sheets with the size 60x120 cm. This fitted sheet will combine perfectly with the other items from the Miffy theme and is available in Olive Green and Nougat.