For now, they’re available in 1280 x 800 and 1440 x 900.
I’ll do more sizes if there’s more demand for them. It’s just time consuming, so I did them in the two most commonly used sizes. Both sizes are included in a zipped file for each creature comic.
If you click on the quoted text, you’ll see what the comic strip looked like (the wallpaper may vary a little bit from the original comic strip, because I went through and made them a bit more uniform.) and then the “here.” links to mediafire where you can download the zipped file for that creature comic.