Larger Size 24” x 12”: The light therapy pad boasts larger size, which can cover multiple body parts. You can use it on your back, belly, waist, abdomen, shoulder, chest, legs, thigh, calf, knees and feet. You can put it over your body while playing with your phone, or you can lean against it while you work. A strap(35”x2”) comes with the infrared pad out of hands-free idea, so you can also tie it around your waist.