This says it comes in three sizes but when I attempted to order it wouldn't let me choose a size. I should have turned away but I did not and ordered it anyway. Well it didn't fit because it wasn't the right size, what a surprise!

UPDATE!!!
After emailing the sender and trying to get a different size, I was told that I would have to pay for the exchange! WHAT? NO! I've already paid for the product and did not receive what I needed, there's no way I will be paying for a second one!