Yoox shoe sizing

It's going to vary some with the brand but I can't imagine a 42 being a 9.5

I'd say 41/42 are around 8.5. Some brands a 41 is a small 8.5. Others a 42 a big 8.5.

try here http://www.styleforum.net/t/164402/ask-a-question-get-an-answer-ask-all-quick-questions-here/11010

It's been a few years since I've bought shoes from Yoox. But I would guess that the EU listed size is more accurate given that Yoox mostly sells lesser-known (at least to US shoppers) EU brands. On the other hand, as with any brand, sometimes you're a size 42 in one brand and then a 42.5 in another brand. Your best best is to buy both sizes and then return one.