4ft6 is the Standard UK Double Size. Our 4ft6 Bed Frames are designed to take a Standard 4ft6 Mattress which measure 4ft6 x 6ft3 (135cm x 190cm).All items are in stock, with delivery as quick as 1-2 days. Each item will show you how quick delivery is, eg 1-2 days, or a day of your choice from a calendar.