Walnut bentwood&faux leather back and seat, metal tapered legs for durability and longevity. Larger size seat width and seat depth, Ergonomic Backrest 360° Swivel Bar Stool, Adjustable Height in A Breeze The largest stable base 17.7 inch; Walnut bentwood&faux leather back and seat, Walnut bentwood&faux leather back and seat Larger size seat width and seat depth, Ergonomic Ba Larger size seat width and seat depth, Ergonomic Backrest The largest stable base 17.7 inch The largest stable base 17.7 inch