One way to convert two twin beds into a king is to place the twin box springs and mattresses into a king bed frame and use a converter belt. Another way to convert twins into a king is to push two twin bed frames togethe... More »

The dimensions of a California king mattress is 72 inches by 84 inches, and a twin-XL mattress is 39 inches by 80 inches. Two twin-XL beds side-by-side are the same size as a standard king mattress. More »

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

The dimensions of a twin-size bed are about 38 inches wide by 75 inches long, according to the Better Sleep Council. About.com puts the dimensions at 39 inches wide by 75 inches long. More »

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

With a measurement of 76 by 80 inches, a king bed is wider than the queen bed, which is 60 by 80 inches. The king is not the largest of all beds. A California king bed measures 72 by 84 inches, while a grand king measure... More »

A California king bed is 4 inches longer and 4 inches narrower than a European, or regular, king bed. It is typically 72 inches wide by 84 inches long whereas a regular king-sized bed is 76 inches wide by 80 inches long.... More »

Twin XL mattresses are 39 inches wide and 80 inches long. They are five inches longer than standard twin-sized beds and are the same length as both king- and queen-sized beds. More »

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

A standard twin bed frame measures 39 inches wide by 75 inches long by 7.5 inches high. A twin extra-long frame measures 39 inches wide by 80 inches long by 7.5 inches high and is more suitable in length for a single adu... More »