I have this one in 43 (9.5 us). Size feels good in 0.5 bigger than normal.

I bought these a half size down because I couldn't find them true to size. But since they're a bit tight i would definitely recommend going true to size on these! Having them a tad too small, you won't be able to enjoy them to the fullest.

My first pair of Asics and assumed true to size would fit well. They are slightly roomy but not by such a huge margin that I would size down in these.