Size options: Choose from 4 sizes - small, small double, double or king size. Mattress: Grab yourself an orthopaedic tufted spring mattress. Inners: Tufted spring inners provides an even, more comfortable sleeping surface and helps the mattress to last longer! Properties: Orthopaedic and pressure relieving design to aid peaceful sleep. Depth: Mattress depth is 20.5cm in total - plenty to sink into! | Orthopaedic 8" Tufted Spring Mattress - Single | Wowcher