I wear a 7 or 71/2. I stood there wondering how they get that much sound out of this little thing. If the protector does appear to have some actual metal in it, which makes the magnet in the AirPods case pull it when aligning. Fits galaxy buds live perfectly but if you drop the case it comes open and buds go flying out of the case onto the floor these slippers are very comfortable. Omg so worth the buy! Have just ordered another pair for my daughter Hope the jack holds. I checked the sizing and both are marked the same but one shoe is definitely larger. Will give an update in a few weeks to let you know how the phone holds up as far as battery use.