I wear a size 8 shoe so I ordered the XL (7-9). Secures boards down well but not theft proof. But i made it work and knowing that all my devices are at my bedside all at once organized. I prefer a wire to vagueries of wireless connections and batteries. The case recharges the earbuds and with that capability, you have up to 10 hours of charge for your Sesh earbuds. Also ordered the 100w block rocker, which sounds amazing! Used for weeks, they have stable connection signals and long battery, very good earbuds, thumbs up! So glad I did, they fit a teeny bit tight but I know will loosen as I break them in. The only con I see is the EQ,. Was a gift and he loved it