I have to go half size down from am1.I have to go a half up from my am1 size because they stay tight around the bottom of the laces, and dont break in much in that area.
Sizing is a very personal think and it is not worth to ask others for recommendations - based on my experience.
Another think is different fitting on different air max plus colorways. Also comfort of them isn't the same like for example "grids" that I like the way they look are extremely uncomfortable, "worldwides" are very tight and other pairs comfortable and not too tight.
I would say that the ones made in Vietnam are way worst then ones from Indonesia