Since I started working out a few months ago, I have been looking for some way to store my ear buds to keep them from getting tangled up.  I checked all the major stores and couldn't find a thing.  So I turned to Amazon - as always, Amazon had a great selection of products I liked!!  I ordered these and love them.  I ordered the large size instead of the small or medium because I want to wind the cord around as few times as possible.  The large size Bobino is perfect for my earbuds and cord!  My workout buddy bummed one off of me when she saw how great mine was - she's a pink type of gal and I'm a green type of gal, so we didn't have to fight over colors - LOL!!  I highly recommend this product!!