Summary: Post rating icons to be used with the post rating add-on. As time permits I'll be extending upon these post rating icons with additional designs so think of this as a work in progress with more icons yet to be added.
Additional info: If you feel icons are missing or you would like to see a specific icon added in a future update feel free to make a suggestion in the Post rating Icons discussion thread. Doesn't hurt to post and suggest and your suggestion may be included.
Thanks to Kevin for starting the existing table (Below) which I expanded upon by including the extended icons. Below is the sizes and coordinates for the icons when you goo setup and start adding the post rating icons to make it easier for you.