This is a headshot/bust of your character. It includes your character from the shoulders up. Price may vary by a dollar or two with overly simple or complicated designs. Note: this does not include a characters hands / front appendages.
This is a halfbody of your character. This may mean that it ends at the waist, that it includes the character's hands / front appendages, or both. Price may vary by a few dollars with overly simple or complicated designs.
This is for a simple background. Backgrounds that take little to no effort, such as a single flat color, do not count and are something you'd get for free. A simple background might be a pattern or a background that's not fully rendered (such as only drawing the ground).
This is for a complex background. A complex background is a scene in which the characters are in a clear place (such as a forest or a living room), or one that is overly complicated.