Q:

Minimum Length for Minecraft usernames?

Related to the question: "What is the format of Minecraft.net account names?". 
I was wondering if there is a minimum length for Minecraft usernames?

A:

The minimum is 4 characters as shown in the screen shots below.
This was changed from 3 to 4 but not sure when as mojang don't publish changes to account details in changelogs.
You will still see the old 3 digit usernames and the odd 2 digit ones. they are legit probably old accounts or developer exceptions.

