What Size Is a 54-inch Bed?
Full beds are 54 inches wide by 75 inches long and are sometimes called doubles. Since they are perfect for growing children and single adults, full size beds provide a versatility that makes them popular. Furthermore, 54-inch wide mattresses are 16 inches wider than a standard twin mattress on average (and also 5 inches shorter than a queen size mattress). This makes them the go-to size option for parents with teenagers or younger children who will eventually grow into the mattress.