What size is a cot bed duvet cover? Rebecca Leonard February 21, 2020 11:23 Updated Follow Our cot bed duvet covers measure 120cm x 150cm. Internal flap measures 40cm. Shop cot bed duvet covers. Related articles What size is a single duvet cover? What size is a cot bed fitted sheet? What size is a cot bed flat sheet? What is thread count? (TC) What materials are used to make our Poly Cotton bed linen and what are their benefits? Comments 0 comments Please sign in to leave a comment.