Childrens/Kids Power Rangers RPM Print Reversible Bedding Duvet Cover and Pillowcase (Twin Bed) (Blue) Please note: This product is a UK import, the sheets supplied are slightly smaller than the standard US duvet size, it will fit but the duvet may fold at the edge when covered. This is not a comforter but sheets for a duvet. High quality bedding set. Fiber: 52% Polyester and 48% Cotton. Size - Duvet sheet: 53 x 79 inches.