I purchased this item new three years ago and used it for a few months before storing it at home. The diameter is approximately 65cm when deflated. It comes with a pump. There is some staining that won't come off (see photos). It will be shipped folded. Trideer Exercise Ball 65cm, Thick, Heavy Duty, Supports 150KG, Anti-Burst, Non-Slip, with Foot Pump, Sports Balance Ball, Fitness Ball, Pilates Ball, Yoga Chair Thank you for looking.