Alpinestars Mens Footwear Sizing Chart
US Size 5 6 7 8 9 10 11 12 13 14 15 16
Euro Size 38 39 40.5 42 43 44.5 45.5 47 48 49.5 51 52
Japan Size 24 25 25.5 26.5 27.5 29 29.5 30.5 31.5 32.5 33.5 34.5
Inches 9.5 9.8 10 10.4 10.8 11.4 11.6 12 12.4 12.8 13.1 13.6
Centimeters 24 25 25.5 26.5 27.5 29 29.5 30.5 31.5 32.5 33.5 34.5

How to measure your feet

Footwear Sizing Information
MEASURING YOUR FEET
Flatten your foot by shifting your weight forward. Use a ruler or tape measurer to measure your foot from the heel to the tip of your longest toe.

It is best to measure your feet after a full day of walking because walking can slightly increase the size of your feet.

It is best to measure your feet wearing the type of socks or stockings you will be wearing in the shoe you plan to purchase. Only measure your feet while barefoot if you plan to wear shoes over your bare feet.

Remember that the difference in shoe size measurements is often as small as 1/8 of an inch, so your foot measurements will need to be equally detail-oriented to be effective. Rounding up or down will decrease the accuracy of the measurement and your likelihood of finding a good shoe fit.

Measure both feet. Most people's feet are slightly asymmetrical. When buying shoes use the measurements from the larger foot.