Could you please include more information about the work in your post?
The sizes of the sprites you need, the number and kinds of animations per character, the approximate number of characters, what kind of non-character art you might need, etc.
In addition, it might help people to know the theme of the game. An RPG can be anything. Some artists have more fun with certain kinds of settings than other. If you have a particular style or feel to the game, you should probably also include references for that.
You should probably also include how much you're paying, since this forum is for paid offers only. If you're planning to offer revenue share or something similar, you should have this thread moved to the Unpaid section.