The 10 fit the length of my foot. Mine broke after ~6 months or regular use. Theres an audible change to the fan noise as the gloves go on. However, sound-wise, these headphones represent a good compromise between completely neutral, and usable. I recommend hold the rack against your chest firmly to insert. This color is all the rage now, so I figured why not join in?! Then there is APTX LL (low latency). And dont worry if they feel a little tight at first, its part of the genius design of them. I had and loved the Teva Zirra sandal, and I wore them till they completely fell apart. Ive purchased several Dearfoam slipper styles trying to duplicate those former ones, with no success.