Flash Furniture HERCULES Series 24/7 Intensive Use Big & Tall 400 lb. Rated Black Leather Executive Swivel Chair with Lumbar Knob Contemporary 24/7 Multi-Shift Use Office Chair. Swivel Seat 400 lb. Weight Capacity. High Back Design. Contoured Seat offers plush comfort Pressurized Lumbar Support Knob. 4'' Thick Foam Padded Seat Tilt Lock Mechanism. Tilt Tension Adjustment Knob Seat size is 25 inch wide x 21 inch deep . Seat height is 21.5 to 25 height in inches