Ihave regular width feet and chose my usual size 6. but durable product. I like that its easy to assemble and doesnt take up much room. Warning to all readers, Mary Balogh is my favorite author and will always get a positive review from me. Ive used these enough now that I can comment on the battery life. Crocs massage my painful feet (nerve pain) :( when I opened the box I thought OH! Lets start with the Pros1. In fact it?s so cheap I don?t plan to buy another pair of Vionic again. Sent Amazon an email and they sent me another unit. Sound quality is very good for long phone calls or conference calls and suprresses most of the background noise.