Shimano shoe sizing chart - Shimano use european sizing. Here's a handy reference chart to convert from Shimano european sizes to US for men and women
Shimano Footwear Size Chart
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Shimano Footwear Size Chart
How Should Your Bike Shoes Fit, Cycling Footwear
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Size Chart - Shimano Shoes
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Shimano Men's Bike Shoes Size Chart – Bicycle Warehouse