They do not run small at all. After two washes, they’re trash. I was not expecting to receive a re-packed unit. - Glides more easily and more smoothly than any other mouse I have. Had Birkenstock’s before and very happy with them, so knew what we were getting. I am definitely pleased 😄 I often have calls or meetings I need to join and never experienced issues with it thus far. I did this cuz alot of reviews ended up getting theyre regular size and had to send it back for a bigger size. YES they have great microphones for phone calls, but these only benefits to the others youre talking to, not YOU. So I ordered 8s and they fit ok.