Dimensions & Ergonomic Specs — Task Chair One Base & Mobility Components Base Diameter: Ø 700 mm (approx. 27.6″) — stable and spacious for support brado.it +3 brado.it +3 rmf-group.com +3 brado.it Base Height (to floor): 70 mm (approx. 2.8″), excluding casters brado.it +1 Casters: Ø 60 mm (approx. 2.4″) — smooth rolling on most floor types The Home Depot +5 brado.it +5 Amazon +5 Gas Lift (Height Adjustment) Gas Lift Dimensions: 50 × 28 × 230 mm (contains internal cylinder, etc.) officedepot.com +3 brado.it +3 brado.it +3 Adjustment (Run): 125 mm (approx. 4.9″) — gives a comfortable range to raise/lower seat height brado.it +2 brado.it +2 Seat Mechanics & Travel Sliding Seat Travel: 72 mm (approx. 2.8″) — the seat can slide forward or backward for proper depth adjustment St. Petersburg Foodies Backrest & Ergonomic Features Backrest Type: Assembled plastic frame with SDR breathable mesh and integrated lumbar support — no numeric dimensions, but constructed to follow natural spine curvature brado.it +2 brado.it +2 Armrests Armrest Type: 4D Joga/Halo — adjustable in height, depth, width, and rotation; soft-touch paddings included brado.it +2 brado.it +2 Estimated Full Dimensions & Ranges Where exact measurements aren’t published, here are well-grounded estimates—based on typical task chair dimensions (e.g., similar mesh task chairs often fall within these ranges) brado.it +4 officedepot.com +4 rmf-group.com +4 : Overall Width (footprint): Approximately 700 mm (27.6″) — matches base diameter Overall Depth: Estimated 650–700 mm (25.5–27.6″) — includes base, seat, and back housing Overall Height (floor to top of backrest): Likely around 1,100–1,200 mm (43–47″) — typical for mid- to high‑back task chairs Seat Height (adjustable): Lowest Position: Estimated 430–450 mm (17–18″) Highest Position: Around 560–580 mm (22–23″) — accounting for 125 mm of gas-lift adjustability Seat Depth (usable sitting area, after sliding): Minimum Depth: Approx. 400 mm (15.7″) Maximum Depth: Approx. 480 mm (18.9″) — sliding seat adds ~72 mm adjustability Dimension Summary Table Specification Measurement / Estimate Base Diameter Ø 700 mm (27.6″) Base Height (no casters) 70 mm (2.8″) Casters Diameter Ø 60 mm (2.4″) Gas Lift Run 125 mm (4.9″) Sliding Seat Travel 72 mm (2.8″) Overall Width ~700 mm (27.6″) Overall Depth ~650–700 mm (25.5–27.6″) Overall Height ~1,100–1,200 mm (43–47″) Seat Height (min–max) ~430–580 mm (17–23″) Seat Depth (min–max) ~400–480 mm (15.7–18.9″)