UK size 4 = European 37 = Volver 36 = American 6.5 = Length 23cm
UK size 5 = European 38 = Volver 37 = American 7.5 = Length 24cm
UK size 6 = European 39 = Volver 38 = American 8.5 = Length 25cm
UK size 7 = European 40 = Volver 39 = American 9.5 = Length 26cm
UK size 7.5 = European 41 = Volver 40 = American 10 = Length 26.8cm