If in between sizes I would recommend getting the bigger size. I usually wear a size 8 in women they were out of stock so I got a size 7 and they fit perfectly. Best of all, they have a low profile and fit almost flush with my ears. These are beautiful ?? These do NOT work with the Astro A50s And I am big fan of the company. Anyway, sorry Mack . They were exactly as I expected and fit true to size. Since there are only two digits after the decimal comma on airplane radios, each step in rotation of the knob changes the frequency by 0. Vacumned the floor and today looked at the bottom the slippers.