Keen Footwear Women’s Size Chart:

U.S. 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 12
Euro 35 35.5 36 37 37.5 38 38.5 39 39.5 40 40.5 41 42 43

Keen Footwear Men’s Size Chart:

U.S. 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 13 14 15 16 17
Euro 39.5 40 40.5 41 42 42.5 43 44 44.5 45 46 47 47.5 48 48.5 49