Twin mattresses are usually 38 inches wide by 75 inches long or 96.5 cm wide by 190.5 cm long, while twin XL mattresses are 38 inches wide x 80 inches long or 96.5 cm wide x 203 cm long. Therefore, the key difference is the extra length that a twin XL mattress offers, making it ideal for taller sleepers who need more legroom. Not sure which is right for you? Get tips on choosing the right bed size for your lifestyle.
Learn more about mattress sizes in our Mattress Size Guide.