FeatSize: 35 x 34 x 10cm(L x W x H) (Approx); Unique design helps stimulate blood circulation and invigorate back muscles; Perfect for improving the ergonomic comfort of your office chair or favorite chair at home; Universal design , suitable to almost all 12V cars; Back Cushion offers super comfort and lumbar support for your car or office chair. The unique design hugs your lower back to help improve your posture and reduce stress to the back, thereby reducing low back pain. Our Back Cushion provides comfort and pain relief whether you are at home, at the office or on the road.