There are three sizes to choose from so I don?t have to buy 3 separate orders to test them and see if they fit in my ear. So now I have to start process of return and replacement and hope that they have finally fixed this known fault. The sound quality rivals other big name speakers and headphones I have in the house. I have other crocs which fit great, sadly these proved not to be for me My only gripe is that they are so sensitive to the touch that I accidentally hang up on people if I touch the right headphone Nothing online ever fits, but for some reason this dress fits perfectly. These work fine that I dont need to use a seperate DAC that I use for other headphones in my collection. Hardware issue . Ive always been a fan of this style and am happy with almost everything. Bought these shoes a few weeks ago.