Every master bedroom and sleeper is unique. Our large double mattress is available in multiple large dimensions (1.35m, 1.5m, 1.8m) to perfectly fit a wide range of UK large double bed frames. Once unboxed, your full-size mattress will rapidly expand to its impressive large size. We recommend allowing a few hours for it to fully air out and for the premium materials to settle into their permanent, supportive form. GildedGrove Mattress Size: Double (4'6)