Twin/Full/Queen/King Printed Cotton Duvet Cover Set With Pillow Case Flat Sheet Welcome to my eBay Store. Please add me to your list of favorite sellers and visit often. Beautissu Flat Sheet White NILO Bed Linen 100% Cotton - Single Size 150x260 cm White Sheet without Elasticband - Versatile Linen 4.7 out of 5 stars 4 £8.99 £ 8 . 99 Twin, 3/4, Full, Queen, King, Split - Queen & King or any size are made to the measurements of your bed. If you Need Assistance or can't find your size, you are welcome to call us toll free at 1-866-988-2333 Please leave a message if we are helping other customers. Aug 13, 2019 · A twin size flat sheet is roughly 70 by 100 inches. This is how I would proceed: 1. Cut the top hem off so have roughly 70 by 94 inches and then remove any tags. 2. Then cut it in half so you are left with 2- roughly 70 by 47 inch sections. 3. Fold over the edges and make a half inch hem all along the two sections.