Features: Navy Blue Fabric Upholstery Thick Padded Back, Seat and Knee Rest Provides Firm Support Height Adjustment Knob Reclining Back for Sitting or Lying Down Positioning Natural Wood Frame Dual Wheel Casters Wooden Ergonomic Kneeling Posture Office Chair with Reclining Back [WL-SB-310-GG]. Seat Size: 16''W x 12''D. Seat Height: . Back Size: 16''W x 12.5''H. Arm Height From Seat: . Overall Width: 18''W. Overall Depth: 30''D. Overall Height: 31''H.