iCoudy ERGONOMIC OFFICE CHAIR · Upgraded comfy office chair with adjustable lumbar support; · Thickened sponge cushion offers for all-day comfort; · Office chair with flip up arms for space saving. ERGONOMIC S-SHAPED BACKREST · The modern "S" shape back provides superior lower-back support and all-day comfort to reduce back pain from prolonged sitting. · High density mesh back provides good breathability, good back support, wear resistant and built to last. Ergonomic Office Chair with Upgraded Lumbar Support · Adjustable range：5cm · The desk chair has an adjustable lumbar support for the most comfortable and personalised support while working. Office Chair Height 36.2 - 40.2''/ 92 - 102 CM Chair Back Size 19.7''W x 21.3''H / 50 x 54 CM Chair Seat Size 19.7''W x 19.7''D / 50 x 50 CM Seat Thickness 2.8''/ 7 CM Chair Seat Height from Floor 16.1 - 20.1''/ 41 - 51 CM Arm Height from Floor 24 - 28''/ 61 - 71 CM Outside Width across the Arms 24.8''/ 63 CM Chair Base Diameter 24.4''/ 62 CM Office Desk Chair with Flip-up Armrests - Space-saving desk chair with flip-up armrests that slide under your desk when not in use. - Perfect for small spaces at home or in the office. Adjustable and Versatile Office Chair - Adjustable height 4" (10cm) - With a 360-degree swivel, adjustable seat height, flip-up armrests, and flexible swivel casters, our office chair provides the perfect fit for any workspace. Durable and Stable Computer Chair - Load-bearing capacity: 265lbs - A sturdy nylon base and certificated gas lift cylinder provide stability and mobility for daily use. - The 360° swivel casters ensure smooth-rolling mobility. Computer desk chair suitable for office or home use Easy Assembly Desk Chairs - All components and tools are included in the package; - Instructions and a video tutorial provided; - You can usually assemble this office chair on your own within 15 minutes.