Yeah, this annoyed me. I live right next door to a jeweler who could have given me a standard sizing easily, but I bought the kit at their suggestion/mild insistence.

What's worse, I threw it out when I was done, given that it was a PLA sheet with no other apparent use, with it being nonstandard and all. So now I'm not even sure if I need to size up, because I'm not going to buy a second sizing kit to refresh myself on the fit.

Like, come on.