How would one go about posting pictures? *has drawn a picture of a ferret but realizes I don't know how to post pictures*
And to the ferrets in costume, that reminds me of Hetalia for some reason, probably the one saying 'Aniki' and the one in the scarf-thing, South Korea and Russia....yay Hetalia
@Matt: printing resolution is ideally 300dpi, though if you skimped on the quality you could get away with 150dpi. This means if Ferret wants to print it on anything larger than a post-it note, you need to provide him something in the thousands of pixels. 3600x3600 pixels is a good starting point... not what you've got. And if you do blow it up that big, you may want to consider using a sharpen filter, because it's a b&w sketch so you won't get as much in the way of artifact.