Please educate on international ammo standards & availability

[snovvman]

Here in the U.S., .40 S&W, .357 Sig, and .45 ACP are widely available. I'm guessing that 9mm is common throughout the world.

Question: What are common handgun rounds in Canada, Mexco/Central/South America, Asia, and Europe?

I presume .380 is available (James Bond, Walther PPK)? In addition to 9mm, what else?

Can one get .40, .357, and/or .45 elsewhere throughout the world as easily as here in the U.S.?

Thanks.