Flex top split king bed owner enjoy the luxury and high quality of our wrinkle free cotton blend sheets made for your adjustable â splitâ topâ king bed. The split-top fitted sheets has a 30-32 inch split from the top and is made with 6 corner pockets 16 inches deep with wings extra fabric in the middle to keep the fitted in place that will allow each side to move freely. sheets are damask stripe woven at 650 thread counts made from 70% cotton 30% polyester that will give you comfort softness and durability. Our top split king sheet set comes complete with one flat one fitted sheet and two pillowcases. Dimension splitâ topâ king adjustable cotton bed sheets set 4-piece setâ includes:â oneâ flat sheet measures 110 inches wide x 102 inches long â oneâ top split fitted sheet 78 inches wide x 80 inches long with 6 corner pockets to fit 16 inches deep pocket mattress andâ twoâ king pillowcases measures 20 inches wide x 40 inches long each.