Avatar help

[callaway1234]

Hi I'm sorry if this is a stupid question (well, I'm stupid with these kind of things) but can anyone make it so I can use this as my avatar? I don't know how to do it... tried re-sizing it, don't know how to make it a jpg or whatever...

 

[King Nate]

I don't know if anybody helped you yet, but here it is just in case: