Which Size is Right for Me
Twin Size: A twin (or “single”) mattress is the smallest possible mattress size other than a crib-size mattress. Twin mattress dimensions are approximately 38 inches wide by 75 inches long. At approximately 75 inches long, both twin and full mattresses may be too short for some adults and designed for only one person.
Full Bed: The full size mattress, also known as a double mattress, is approximately 16 inches wider than a twin mattress, but does not provide enough added room for two people to sleep comfortably. It may be too short for adults taller than 5'5”. Full beds are 54 inches wide by 74 inches tall.
Queen mattress: 60 inches wide by approximately 80 inches long – 7 inches wider and 5 inches longer than a full-size mattress. These added inches can make all the difference in comfort, especially for couples, and have made the queen-size mattress today's most popular mattress size.
King Size Mattress: are 76 inches wide by approximately 80 inches long – about 16 inches wider than a queen. This is the closest a couple can come to having sufficient personal space.