Relative to the design and strength level found in professional balls used by physical therapists and high end gyms, for me this was the cost effective option. I looked at higher pressure rated balls; did not have a need. 4 stars because there are better balls, 4 stars because this one is very good for the $. I inflated it with a foot pump at $8.72, never could figure how to use my auto tire pump, connections didn't work despite the info that it should. I wrote this to advise I inflated the ball so it was hard - 23 diameter. I doubt it could be inflated to 26, would require stretching the membrane but it is not high strength. This is not a ball that has the strength to be balanced on one foot at a time, or jumping on it. For me, this was fine. A happy note was the plug sealed effectively with no leaking (so far, after a couple weeks).

This was easy to inflate, and fun to use. Good excersize

Using for exercises to strengthen back

Needs to come with a pump! Took me two pumps to find one that remotely worked without taking forever.

Well made and comes with a measuring tape with Max and Min inflation indicator. Follow the directions and don't use for the first 24 hours.

Previous reviews were right, order a size up. I'm 5'2” and ordered the green one, it's more like 55 than 65. Red would have been too small.It doesn't come with a pump so I used my bike pump. Other than that, great quality ball that will last a long time.

I needed this ball to help with some back muscle exercises but the photo displayed the pump and it did not come with the pump. It was difficult to find a way to pump air into it. I eventually had to buy one but my intention was to buy all in one.

I like it.but the pump missing

The ball seems to have good quality, but it is VERY HARD to inflate. I never managed to inflate it to the size it says it can reach. Works for me, but definitely could be better

Good