I'm a little surprised by the size of the ball, which I expected to be 65 cm in diameter. Unless I am seriously underinflating it, the size was overstated. I am using it as a desk chair, and I feel like I'm practically sitting on the floor as I type this. Will try to inflate further and see if it helps. Speaking of which ... the foot pump is pretty useless. I'm using an old hand pump left over from another ball.
Very odorous at first. Takes about a week for that to go away. And after you air it up the first time and then use it, you may need to add more air one or two time. The rubber is just expanding to where it should be. It's air tight. I sit on mine all day.
The exercise ball was the of the size and durability that I expected to receive. I use it as an office chair substitute and for exercises, and it's held up so far.
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