The Men's Uno runs a bit long.  We recommend ordering a half-size down from your normal size.

 US 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5
Italy 40.5 41 41.5 42 42.5 43 43.5 44 44.5 45 45.5
UK 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5
Japan 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5