At www.BedLinensEtc.com, our King sofa bed sheet set is measured 6" thick and 76"x80" so that they stay snugly on your king sofa bed mattress. At Bed Linens Etc., we design our sofa bed sheets specifically to prevent slipping, bunching, and sliding. We attach the top sheet to the fitted sheet so making up your sofa bed is easier than ever. This construction keeps your guests comfortable while sleeping as well. Our sheets are made where they don't slip and slide like the cheap ones that most retailers sell. If you have a special size sofa bed or sleeper sofa please contact us and we will custom make you a sheet set. We also carry king sofa bed mattress pads.