The longest personal name, according to the Guinness World Records, was 747 characters long, and happened to be in a latin alphabet. So I guess ~ 1000 bytes sho

The longest personal name, according to the Guinness World Records, was 747 characters long, and happened to be in a latin alphabet. So I guess ~ 1000 bytes should be OK. Or even maybe what could be enough to fit 200 arbitrary utf8 codepoints, so 800 bytes. If you want to be safe maybe allow for up to 1000 arbitrary codepoints? :)