In the United States, a standard twin mattress normally measures 39 inches wide and 75 inches long, which is the same length as a standard double mattress. In the United Kingdom and Ireland, the average twin mattress is ... More »

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A full-size bed, also known as a double bed, is 54 inches wide and 75 inches long. A full-size mattresses has the same proportions. Thickness and firmness vary depending on the model and manufacturer. More »

www.reference.com Home & Garden Furniture Beds & Mattresses

A good mattress measurement chart can be found at BackToBed.com. This chart details all mattress sizes and includes helpful information on selecting the best sized mattress for your needs. More »

www.reference.com Home & Garden Furniture Beds & Mattresses

A standard twin mattress is 39 inches wide and 75 inches long. A length of 75 inches is often too short for many adults, which is why the twin XL was invented. A twin XL is 39 inches wide and 80 inches long. More »

www.reference.com Home & Garden Furniture Beds & Mattresses

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. More »

www.reference.com Home & Garden Furniture Beds & Mattresses

A standard twin bed mattress is 39 inches wide by 75 inches long. A twin bed is made to accommodate one child or one adult. More »

www.reference.com Home & Garden Furniture Beds & Mattresses

To determine whether or not a twin mattress fits through a door, compare the measurements of the doorway plus any immediate clearance necessary with the length and width of the mattress. A typical twin size mattress meas... More »