A super king mattress is 180x200cm, the largest standard British bed size before going to bespoke. The 180cm width gives each adult more space than a king (150cm) and changes how couples sleep, especially for restless sleepers and households with a child or pet who shares the bed. Cheap Furniture Warehouse, Cox and Cox and Furniture in Fashion between them cover £17-£16,329 across the range. The pricing brackets follow the standard mattress tiers: pocket spring at £200-£500, hybrid memory-and-pocket at £500-£1,200, premium memory-foam-and-pocket-spring at £1,200-£3,000. Above £3,000 sits the bespoke and high-spec hybrid market. Bed-base sizing matters: a super king mattress needs a super king base; a king base with a super king mattress overhangs by 30cm and the corners hang in mid-air. Always confirm both before purchasing. read more…