They fit in the palm of your hand and are great for wiping up little spills on your table or countertop. Useful for wiping up little faces too and I figure they would be cute little coasters as well! Probably good as little hotpads for lifting hot lids or baked potatoes. Gee, so many possibilities!
Karen has the pattern for this on her blog so it you are a knitter, I think you should get this great little pattern. If you don't knit, Karen sells these on her Etsy site.