What size is a Superking flat sheet? Rebecca Leonard February 13, 2020 10:54 Updated Follow Our Superking flat sheets measure 270 cm x 300cm. Shop Superking flat sheets. Related articles What size is a double flat sheet? What size is a emperor fitted sheet? What size is a Superking fitted sheet? What size is emperor flat sheet? What materials are used to make our Cotton bed linen and what are their benefits? Comments 0 comments Please sign in to leave a comment.