I did some looking and I couldn't find any answers regarding this question.

I originally wanted my name as Anakin Skywalker (same as now but with a space between Anakin and Skywalker) but it wouldn't let me put in that many characters.

Since then, I've compared the character length to other usernames and they have more.

How come some people have more characters in their username than you can put in when you sign up?