I wouldn't size down on 8IE. I don't know why binaryfi's ran big, maybe he sized up, but my pair ran very true to size, maybe even tighter than my other thanaz in the same size. and while it does have 2% stretch, it feels like it will only stretch to accommodate your legs, but not permanently stretch. don't take my word though as I've only worn them one full day. I know a member started a thread here asking for help because he was having a hard time stretching his in his normal size. another member, zdenal_cz, even sized up on his pair.