Sizes: Single, EU single, small double, double, EU double or king size (see dimensions below). Bedroom: Get an orthopaedic memory foam mattress. Comfort: Non-spring silent mattress with medium firm support. Guarantee: One-year manufacturer guarantee. Mattress: A luxurious 20cm deep orthopaedic mattress with a 5cm top layer of memory foam. Orthopaedic Mattress | Single | Living Social