I should take size of 9UK. Here, take a look back at your sizing chart guide. Seems like 10US = 9UK (1cm differ) However, based on chart on exact box, it is 10US = 9.5UK. Its not the same as your chart. Before this i do chat “RevRunnr Malaysia” on Facebook. He also stated the same as sizing chart guide. I bought two pair, focusing on the UK size. But me and my friend just uses it anyway, urgent used on event, the parcel arrived one day before it. Then, we have to tighten the shoelaces more.