Hm.. I'll show you a few from my collection that are in your guidelines. (so as not to bog down your thread I will link to the pics in my gallery)

albino nelson's milksnake http://www.ball-pythons.net/gallery/...=3&userid=1428

kenyan sand boas (normal and anerythristic. the normal is in shed.)http://www.ball-pythons.net/gallery/...=3&userid=1428

greyband kingsnake http://www.ball-pythons.net/gallery/...=3&userid=1428

speckled kingsnake http://www.ball-pythons.net/gallery/...=3&userid=1428

mexican black kingsnake http://www.ball-pythons.net/gallery/...=3&userid=1428

tangerine honduran milksnake http://www.ball-pythons.net/gallery/...=3&userid=1428

roughscaled sand boa http://www.ball-pythons.net/gallery/...=3&userid=1428

normal and albino stripe california kingsnake http://www.ball-pythons.net/gallery/...=3&userid=1428

Any of these will stay small, and are easy care. If you have any questions about the care for any of these snakes. I'd be glad to help you.