Airbedz mattresses come in several different sizes to fit compact, mid, and full sized trucks in long and short bed layouts. Cutouts on each side allow the mattress to fit around and over the wheel wells in the truck bed, creating a sleep area that utilizes the entire truck bed. An integrated air coil system evenly distributes weight across a 12 inch thick mattress, providing a better night's sleep to the outdoor enthusiast. Comfort matters and with AirBedz Original Truck Bed Air Mattresses a comfortable night's sleep is now available to anyone who enjoys the great outdoors.If you are not sure what size to order please call us 800-234-1486. It is expensive to have these shipped out by mistake.