5 to 7 especially in sandals and I accidentally bought these in a 7. Had to find true stainless steel bolts to replace. Son acolchadas. After a few emails/claim forms they credited me for a new pair to purchase from their website. In addition to being awkward, it also pulses the sound, and occassionally makes it so I cant reliably use the microphone. So would I buy from them again? No, I cannot use or recommend products where the company is not loyal to, or trusting of their customers. I had a little difficulty putting them together. In total, Ive had to charge this mouse because it was nearing 20% charge remaining a total of twice in a month of heavy usage by simply plugging it in when I was cooking, at work or walking my dog. Id buy them for $30-40 if I was looking for cheap headphones, but when Im paying over $100 for headphones Im expecting something that will last at least two years and that will sound good, and I can already tell that these dont fit either of those criteria. Eventually they did enter pairing and the sound was no better.