Well, I'm happy to report that I got my package from xpmedical today!
6 dry 24/7's, 2 m4's, 2 m2's, and a sample of boosters. (those boosters are HUUUUUUUUUUUUGE )
anyway, the dry 24/7's are too big for me
the tapes overlap at the top. the m4's seem to fit....okay. the m2's are just right, though.
I completely filled up (~2 gallons of water) the whole day, put a 24/7 on, and didn't even use it all the way. these things are insane.
anyway... there's my update. dry 24/7's will *barely* fit a 31" waist.