never seen it. 5 in some shoes when I want them snug like flats and heels but a 9 or higher in other shoes like sneakers or tennis shoes and some sandals. I am a 38-year-old single mom and I have this installed in 30 minutes I seen so many complaints about they had to cut those that didn?t fit the straps or two whatever well then you?re doing something wrong because this was so very easy if you have even a little bit of commonsense about installing anything I?m no mechanic or hardware specialist I just followed the directions and it was quite simple they lasted all your beautifully did not tear any of the padding which is what I was worried about the Unfortunately, these just couldnt maintain a connection between the receiver and the headset. Holds approximately 30 glasses total of various sizes. Very versatile overall performance that makes them suitable for lots of different listeners. Detto questo e dopo aver provato sia le testine sensitive che le precision clean posso dire che le Cross Action sono quelle con le quali mi si sono trovata meglio. Bluetooth doesnt pair with any of my devices. Had an issue with my gfs other headset, so we bought her these. Totally protected speaker strap.