Homessity HC-8006 2 PU Leather Modern Adjustable Swivel Hydraulic Chair Bar Stools, White Base Diameter : 17.6 Seat dimensions: 17.5"(W) x 16"(D) Seat height: 24.25  32" adjustable height, seat height: 24.25" - 32" adjustable height Back dimensions: 18.2"(W) x 10.5"(H)