I want to LOVE these so bad...the size is accurate.  This was my second time purchasing these, the first pair I had to return because one arch was much thicker that the other.  Months later, I tried them again hoping the first time was a fluke.  No fluke...the exact same issue...the right mid point, or arch is noticeably thicker than the left.  Returned then and will not try a 3rd time.