The Helibeds range of 5ft King Size Mattresses all measure 5ft x 6ft6 (150cm x 200cm) and are suitable for Slatted Bases or Divan Bases. If you see a Mattress listed in another size that is not listed here, get in touch as we can almost certainly get it for you fast. The 5' Mattresses we keep in stock range from Standard Open Coil, Pocket Sprung and some that combine several types of support system, including Pocket sprung and Memory Foam Mattresses. 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.