They give you a bunch of different sizes to try out which helps, but at the end of the day to get the full noise cancel they have to sit a little tighter than earbuds. Easy return. At the current price of 100 bucks they are highly overpriced. When I finish with this one. So I got a 12 (as these dont come in half sizes). First off let me say that I LOVE chacos and have worn them for years! You do have the option of returning them for a full refund, which is what Im doing. I have the heels hanging over side since heels slide thru grate openings. Now with this organizer we have claimed a lot more counter space back and we can easily lift up the rack to clean any spills underneath. My first pair of Bloch heels and the split sole is new to me as well.