It shouldn't matter how others size, everyone's build is different, just size up 1, it'll begin off as tight and then should stretch/accommodate to your waist, use your head.
i dont know how to explain it but
1 size up is skin tight
2 sizes up is baggy yet sorta slim
what do you guys go for?
also how how much do you size up for the STFs to shrink and fit like the ones posted by that guy
on that site