What is the most common bowl size?

So, you're wondering about bowl sizes, huh? It's a weirdly specific question, isn't it? I mean, who thinks about bowl sizes unless they're, you know, deep into whatever uses those bowls. Anyway...

The most common size I've seen, and I've seen a lot of these things – seriously, my friend collects them, it's a little alarming – is 14mm. That's the diameter of the, uh, the joint, I guess you'd call it? Think of it like the opening where you… well, you know.

18mm is also pretty popular. I remember my brother had one of those, a giant thing. It looked completely ridiculous on his tiny little… whatever it was for. 10mm? Yeah, those are usually on the smaller, more… delicate devices. Like, the kind you might find tucked away in, I don’t know, a jewelry box or something? Definitely not the kind my brother had. He liked to go big, that one.

These sizes? They're all about the diameter of that connecting part, the bit where everything fits together. It's pretty crucial to get the right size, otherwise… well, let's just say things can get messy. Believe me, I’ve learned that the hard way. More than once. Don't ask.