They ALWAYS run small. 5mm connector. Ive had zero problems! There is a decent width to the soundstage and good instrument separation. Returning, dont reccomend these boots. That means Im unable to resist the upgrade bug, so naturally I had to go for these. My only disappointment is that sometimes after being run at high volume for a few hours the built-in thermal protection powers the amp down to cool, which not too cool when were in the middle of a movie. My first thought was that any sound staging would be diminished with the newest model. Id order whatever size you usually are, and if you are often between two half sizes, choose the large one because the elastic properties of the shoe will allow them to mold to your feet and stay secured. Having worn them for two days straight, I can confidently say that these are the best noise-cancelling headphones Ive ever owned.