>Hello，my dear friend!
If you want make a very correct choice you should choose by the size chart at the Second image !!!
>Size Reference

US3.5=CH36=EU35=UK3.0=228mm=8.9763inch (bare feet length)
US4.5=CH37=EU36=UK4.0=235mm=9.2519inch
US5.0=CH38=EU37=UK4.5=238mm=9.3700inch
US6.0=CH39=EU38=UK5.5=245mm=9.6456inch
US6.5=CH39/40=EU38.5=UK6.0=248mm=9.7637inch
US7.0=CH30/40=EU39=UK6.5=251mm=9.8818inch
US7.5=CH40/41=EU40=UK6.0=254mm=10.0000inch
US8.0=CH41/42=EU41=UK7.0=257mm=10.1181inch
US8.5=CH42=EU42=UK8.0=260mm=10.2362inch
US9.0=CH43/44=EU43=UK8.5=267mm=10.5118inch
US10.5=CH44/45=EU44=UK10.0=273mm=10.7480inch
US11.5=CH45/46=EU45=UK11.5=279mm=10.9842inch
US12.5=CH47/48=EU46.5=UK12.0=286mm=11.2598inch
US14.0=CH48=EU48=UK13.5=292mm=11.4961inch

Please reference our size picture carefully!
Measured by hands， please allow 1-3mm error!
Due to computer monitor， may exist some color error， please do not mind!