Men US6=UK5.5=EU38.5=24cm, Men US6.5=UK6=EU39=24.5cm, Men US7=UK6=EU40=25cm, Men US7.5=UK6.5=EU40.5=25.5cm, Men US8=UK7=EU41=26cm, Men US8.5=UK7.5=EU42=26.5cm, Men US9=UK8=EU42.5=27cm, Men US9.5=UK8.5=EU43=27.5cm, Men US10=UK9=EU44=28cm, Men US10.5=UK9.5=EU44.5=28.5cm, Men US11=UK10=EU45=29cm, Men US12=UK11=EU46=30cm
My only downside is that they are a bit too big I would have gone down a size if I’d known. Overall I’m very satisfied and will be ordering more!