I purchased this after my coworker bought one. I got it and the bag is not the same one as hers. It is so small it does not even fit in the chair. I am not ordering another one either because I am not going through the hassle of the return if the ball is once again incorrect. After reading many reviews for this product, it seems it has happened to quite a few other people. How can a company package so many products with the wrong item??