1. an avvie (avatar) is the little picture under your username, a siggie (signature) is the banner that is under every post. a set would be an avatar, signature, and profile picture.
2. medium is a little vague, especially if we don't know what kind of picture (avvie, sig, etc.) you would like. SS has size limits on each type, so we can either make it as big as allowed, or if you would like it a specific size you can tell us here.
4. What would you like the text to be? a name? a quote?

If you answer these questions, one of us will be able to make your request. Thanks for looking at our shop!