There are several size chart used in footwear around the world. There are US, European, and Asian size chart. In Toyobo, we mainly used only two size charts for our products: European and Japanese size chart.
Our boots sizing separated into two sizing charts. We use European size chart on our high boots (Giga, Zetta, EN-12568, 8805, 8808, 8809, and 8833), and use Japanese size chart on our lower boots (1333, 1688, Phantom, and Tracktion). The reason why we use different size chart is about the shoe last we use during production. In Indonesia, we commonly use European size chart, so don’t be confused. Basically the length/width are almost the same. So, here is the size chart conversion for you reference.