New Wobble Stool Adjustable Height Active Sitting Balance Perching Chair for Office Standing Desk Best Tall Swivel Ergonomic Stability Sit Stand Up Perch Stool THE BEST ACTIVE SITTING CHAIR! Rock, swivel, move & burn calories while sitting. Easy to sit on. Fast to get up from. More functional, fun and aesthetic than a balance ball. Small, compact footprint LARGE ROUND FRAMELESS FABRIC SEAT: new round, dimpled design engineered for better comfort! 13+ diameter. 3+ of premium molded foam cushioning waterfalls over the edgeless design for more comfort PERFECT STANDING DESK PERCHING STOOL: the adjustable height Wobble Stool takes a load off your legs letting you rest and perch near standing height. Its the best standing desk office stool COUNTER-BALANCED STABLE BASE safely moves with you & rests naturally upright so you can sit normally without rocking or balancing. Rubberized coating is non-skid, non-scratch & grips most surfaces ADJUSTABLE HEIGHT ~23-33. SWIVELS 360. RESTS upright when not in use. Does NOT require constant balancing. SIMPLE 4-step, tool-less assembly. Original active stool designed by Uncaged Ergonomics