Pick the right size first
Single (3.5×6.5 ft) suits children and guest rooms; Queen (5×6.5 ft) is the most popular adult size; King (6×6.5 ft) and Super-King (6.5×7 ft) are best for master bedrooms with at least 12×14 ft of floor space. Measure the room first — leave at least 24 inches around two sides of the bed for movement.