A DHS small double bed frame accommodates a 120 x 190cm mattress within an overall frame footprint slightly larger. In UK bedrooms of 280 to 320cm width, the small double frame leaves comfortable clearance on both sides for bedside tables and walkway space. The 15cm width difference over a standard double (135cm mattress) is rarely noticeable in sleep but very significant in room layout terms, this is the key dimension to check before committing.