I was afraid it would be too small like most vivo barefoot I wear between n a 5.5 and 6 along as the toes aren't too narrow, and am closer to a 6 generally.  I am thrilled with these high end leather shoes!  they look expensive and feel expensive and can wear with or without socks. all the vivo barefoot types have helped wit several issues, slipping/falling, bad joints and a broken metatarsal as well as vertigo,  so I wanted a pair in each : sandals, boots, shoes and now I have my shoes.  The running type shoes were sized so strangely I never found a pair that fit right.  Instead, I will have these to walk in.