However, in other parts of the world, couples who share a bed may opt to use two single duvets rather than one double or king-size duvet. Often dubbed a Scandinavian sleep hack, this method of ...

A small double, or queen-size, mattress measures 120 x 190cm (approximately ... Following this advice would mean, for instance, that for a king-size bed (150 x 200cm) you'd need a 6 x 8-metre bedroom.