Is there a weight limit for a fitness ball?

I have a 1-2-3 Core Fitness program and I am scared to use the ball because I don't know if you can use the ball if you are 200 lbs.Is there a weight limit for a fitness ball?I am 6 foot 6 and 215 pounds and I use a cheap ball I bought at wal-mart. So I think you should be fine.