This is the largest piece that I coloured with markers, measuring in at 18"x24".  I like horses that have a light tan colour, with dark ends on the legs (and between the legs!) and muzzle, and a darkly coloured mane.  I made her mane a lighter colour to keep the piece from getting too dark, but I think it would have worked either way.  I also coloured her bracelet with Pride colours, but I have more fun imagining her with a male than female ;)