Modern High-Back Black Ribbed Upholstered Leather Executive Office Desk Chair (High Back White) 360 Degree Rotation - 360 degree swivel ability provides plenty of convenience Ergonomic Design - Soft mesh upholstery is highly comfortable with ample padding Full Size - Sit back and relax against full-length leatherette padding while keeping your arms supported by the extra padded armrests Pneumatic Lift System - Pneumatic gas lift system comes in the form of the lower handle which will smoothly adjust the seat height to your personal preference, allowing you personalized comfort Tested & Certified - Meets or exceeds all ANSI/BIFMA standards; Seat Dimensions 18-1/2"(W) x 18-1/4"(D); Back Dimensions 17-3/4"(W) x 25-1/2"(H)