5 very wide feet and ordered the 9-10. I only took away one star for the uncomfortable battery pack. But it does fit my gen. I was super sore the next day and even a sneeze had me on the ground. You can definitely hear every instrument, breath of the vocalist between passages, the separation and sound stage is definitely clear in a good way. We haven?t installed anything like this before. Songs sound low and drowned out. Fits perfectly in the ear canal and has yet to fall out accidentally since I recieved them. Obviously you arent getting audiophile audio quality, considering these are only $20 (on sale for $16 at the time of writing). They are a bit tight, and I?ve been wearing them since I got them, and there really hasn?t been much give to them.