The size of donut pillow is 17.4 inchx 13.39inch x 2.64 inch. The layer is made of comfortable and breathable fabric, and the core is memory foam. The memory cotton inner core has enough support and resilience, which can make you more comfortable and maintain shape even after many uses.. seat cushion can bring you comfort that ordinary cushion cannot provide, and of your body with even more care. The donut seat cushion shape with ergonomic inchUinch shaped incisions, use to reduce hip pressure, effectively reduce tailbone pressure, thereby reducing hemorrhoid pain, relieve the discomfort caused by sedentary. perfect for pregnant women, post-operative rehabilitation, office workers and other people. If you give it as a gift to family, friends, , clients, or colleagues, they all appreciate the care you took in choosing their gift. The donut seat cushion can be used anywhere, can be taken anywhere, and can be used for any type of chair, such as wheelchair, office chair, airplane, car,