SIZE One size. You can wear Fearyn both on your right or left side, it's up to you!
HOW TO PUT IN THIS EAR CUFF: 1. Put the cuff in your ear. 2. While in your ear, squeeze the cuff to the right size. It should sit a little tight. 3. Once the cuff has the right size, you don’t need to bend it again next time you wear it. Just fiddle with it a little to make sure the cuff sits perfectly again. If necessary, squeeze it a little tighter.
Note: make sure the cuff sits a little tight. Take it out before bed or shower.