I ordered them and 15 out of 20 fit the mother well. The other 5 weren't the same and we were too big/loose and didn't stop and immediately fell out. I contacted GREAT Revain customer service and they immediately sent another set. The most interesting thing is that the second set was the same. Only 15 out of 20 are fit for purpose. I'm glad I kept the original set and was able to put together all 20 sets I needed from two sets.