The 18" X 36" size can warm just one side or all across the bottom of the bed. The standard, single temperature model warms with a low, consistent heat to surround feet and legs without heating the whole bed or raising the thermostat and features a lighted on/off switch., This model features a luxurious fleece cover that adds an extra layer of comfort - especially if you prefer the BedWarmer? on top of the sheet., Standard Size 18" x 36"
