Ergonomic Office Chair – High Back Mesh Desk Chair with 3D Adjustable Armrests, Wheels, for Home and Office (Black)Color Black Product Dimensions 27. 56"D x 21. 26"W x 44. 88"H Size X Large Back Style Split Back Ergonomic Design is committed to creating the most comfortable ergonomic mesh office chair. Our office chairs are perfectly designed according to the four curvatures of the human spine. With our ergonomic design based on human body curve and real needs from customers. it is easier to work in comfort by freely adjusting the headrest. lumbar support.