Shoe sizes listed on Odd Shoe Finder are based on US sizes. if you’d like to be able to convert from US sizes to other international systems, you can use the charts below as a general guide.
The conversions are correct for the top of the base size. Those at the small end of a particular base size may better fit a size lower in the other size system.
Please also note that shoe sizes can vary from manufacturer to manufacturer.
When purchasing shoes on Odd Shoe Finder you are strongly advised to check details with the seller and request an actual measurement if you are in doubt.
Source: http://www.internationalshoesizes.com