Compared with the small size cushion of 16 inch, 2022 Airllantry new gel seat cushion for long sitting is specially enlarged and thickened (18" Large and 1.5" Thick), can withstand up to 200 pounds of pressure, More Effectively prevent and relieve cervical spondylosis, lumbar disc herniation, sciatica, coccyx pain and other occupational disease symptoms, improves your efficiency and works better. Our chair cushions are not only for office use but also can be used as wheelchair cushions, car seat cushions, and desk chair cushion. Especially suitable for girls yoga, and pregnant women. Airllantry cushion help you have a good day! :)