Try a size smaller than your shoe size, maybe 2. These boots do run very narrow. The fit, my ears are weird. Easy to put on, super secure, easy to remove to adjust bar height. Fits perfectly with my AirPod pro. I can use my old headsets for hours and hours but this hurts a bit after 3-4ish hours and I have a relatively small head. We double checked the settings and then tried my other sons set and another pair of my husbands headphones and they worked fine. Yet, most brands do not offer a narrow shoe option. Since then, no problems. There was red like liquid on the outer soles !