I want to get my dot painted with a custom graphic on it. I decided I want my avatar on it.

The company said I need to send them a pic of it in .jpg format.

How exactly do I save my avatar as a j-peg?
if its a .GIF, use lunapic.com, resize it, and use their save utility. That should work.
I hope you're not going to just tkae the pic from your avatar and blow it up on the guitar, cuz it would get crazy distorted.