Two twin box springs are not the same size as a queen mattress. A queen-sized mattress measures 60 inches wide by 80 inches long. A standard twin box spring measures 38 inches wide by 75 inches long.
Placing two of them together would give you too much width and not enough length. Even though an extra-long twin box spring is long enough at 80 inches, placing two side-by-side would result in 76 inches in width, which is 16 inches wider than a queen mattress. However, two extra-long twin box springs put together are the correct size to hold a king-sized mattress.Learn More
A twin mattress is approximately 39 inches wide and 75 inches long. Extra long twin mattresses have the same width with an additional 5 inches of length. These measurements can vary within half an inch.Full Answer >
Queen mattresses are 60 inches wide by approximately 80 inches long. That is roughly 6 inches wider and 5 inches longer than a full-size mattress.Full Answer >
A North American standard twin-sized mattress measures 39 inches wide by 75 inches long. A twin-XL mattress, which accommodates taller sleepers, measures 39 inches by 80 inches.Full Answer >
A standard twin mattress is 38 inches wide by 75 inches long. A twin XL, or extra-long twin mattress, is 38 inches wide and 80 inches long, according to The Bedding Experts.Full Answer >