I generally have to size up due to my wide width, but a 9 was too big, and I returned for an 8 1/2. Not impressed, bought 3 different styles of nikes, they all had problems. The base of these are so comfortable, if the straps fit correctly. Ideally, ignoring whats possible via physics, Id like to just be able to plonk my phone on the pad and it would charge, irregardless of precision of said plonking. I wear them regularly it?s working well I was sick of struggling with the short usb cord I have to charge my phone. Without the app, the buds still connect to the phone but only the left bud is working. Letting the headset sit without sound turns it off as well, which is fine, if it didnt constantly cause this issue on turning it back on. Super huge!