Please reference our size picture carefully! Measured by hands, please allow 1-3mm error!  US(5)=EU(36)=230mm(bare feet length)  US(5.5)=EU(37)=235mm US(6)=EU(38)=240mm  US(6.5)=EU(39)=245mm US(7)=EU(40)=250mm US(8)=EU(41)=255mm US(8.5)=EU(42)=260mm US(9.5)=EU(43)=265mm US(10)=EU(44)=270mm US(10.5)=EU(45)=275mm US(11)=EU(46)=280mm US(12)=EU(47)=285mm