5 US and ordered a 7 in these and they fit just fine. I love this little stand but it was my fault that I didnt pay attention to the dimensions. I saw a couple of reviews talk about noise cancellation. For me, if I?m sweating, the stay in better. I returned this pair also and asked for a refund. The earhook is also made out of soft silicone, so it doesnt hurt even after hours of wear. My legs are slimed down, my stomach and sides look smooth and I feel really confident. Yes they flex and that allows some additional flex when trying to reach dock cleats that may be just out of reach for a conventional dock rope. Exact replacement. After he accepts the tin star, Johnnys past comes back to haunt him.