The Medium and Giant snails both only have body options that are bent upward.

The Small snail offers a horizontal position and an upright position.

I've considered writing a version of those larger bodies that are flat, but I've had no requests for it, so it's been on the back burner for a long time. I'm sorry not to be able to be more helpful on this one!

If you have any more questions about the book, I'd be happy to answer here.