We used the online ring sizer, printed it out and even went a big smaller than what the sizer said. After all that, the ring is still too big. Rather than return it, I bought a plastic ring sizer thing at Walmart, figuring that would fix the issue sooner rather than have to wait by sending it back and having another one sent back. I read somewhere else that the same thing was another person's complaint. I'm not sure how to fix that, but we did follow the exact directions on website (even printing the sizer ruler) to determine the size. Other than the size issue, this is cute, exactly as pictured and my daughter really loves it.