Why does the price differ for different sizes of the same model?

The price for different sizes may vary mainly depending on how many pairs were produced and how high the demand is. Sizes that many people wear (e.g., 43) are more widely available. On the other hand, very small or very large sizes (e.g., 47) are produced in smaller quantities, which makes them harder to find and their price can be higher by tens of percent. Of course, if it’s a limited release, for example as part of a special collaboration or event, the price is usually high across all sizes and the differences are minimal.