Unfortunately their measurements are completely wrong. They claim that 270mm is "US men's size 10" but that's not true. After trying on these shoes and realizing they were too small, I did a little research to find out what went wrong. The 270mm is actually a size 8.5 for men in the US, not a size 10 as they state in the product description. The shoes themselves are of pretty good quality so I give them at least 3 stars. Before you trust their assumptions, I would strongly encourage you to do your own research on the Asia-US fit.