I've been pondering this saddle for a while. One thing that might not fly is that im a 29 or 30 inch waist and the small is 32 inches at its smallest by the looks of things.
Something that became evident after the TF was made was that it was a saddle that fit a lot of women. The TreeFlex would go small and still be comfortable on smaller bodies than most other arbo saddles.
I'll try to remember to get some measurements off mine today when I'm at the workshop.
I heard a lot of good things about the Treeflex. I've never used one, but it looks really comfy. The only thing that bothers me are those tiny shackles! I know they are rated, but they look so tiny compared to other saddles! I know I'd be questioning their durability while dangling 60' up in the tree.