Exercise Stability Ball Chair with Hand Pump Use for Crossfit, Yoga, Balance & Core Strength Training, Non-Slip & Anti-Burst Extra Thick Fitness Ball(Purple&65CM)

It seems very sturdy and has held it's shape and size for 2 months now. We filled it up to 3/4 size as instructed and let it set for a day, then filled it up to where it seemed comfortable.The cloth tape measure that was provided was not long enough to measure the ball to see if it was inflated the proper size. This is the reason why I didn't give this product 5 stars.

Loses air very quickly. Don’t feel like this one is working well for me .i like the exercise ball but this one seems poorly made. It could just be a bad batch but ruined it for me.

I got mine in today and I have it blown up currently to about 80% of the way. I'll be blowing up the rest tomorrow after work. Comes with everything you need! I can't wait to use it! So far, everything is perfect and the material is really nice. Pump was really easy to use and figure out.

The ball has been going very well! The pump is so easy to use, and I love the purple color! As someone that is 5'6" the 65cm ball is perfect to get the 90° angle when sitting on it.

Was disappointed there wasn't better directions on how much to inflat it, but found some information on U-tube so went with that. Other wise seems to be serving it's purpose and do like using it.

Works great. Easy to inflate.

Came with a pin size leak somewhere and deflates every couple of uses.

I likey does the job... so durable I jumped on it and bounced off tossing me almost across the room...