I've decided to redraw all my beermat and other old geomorphs in a uniform style and size. The three pictured below are drawn on 7mm grid paper (cut from one of my larger pads). I'm going to print a couple of alternative grid sizes and draw the same three tiles. I'll then scan them all and see how they print at different sizes.
I'd say there's about a 90% chance that I'll have another geomorph related Kickstarter before the end of the summer.