Air max 90 sizing?

[melikekicks]

I'm thinking about buying my first pair of Air Max 90's, and i don't know what size to get. I use a 12 in my Air max 1's, as well as Jordan 3's. Should i go up or down in size?

 

[fresh out dabox]

half a size up

 

[pinero84]

always go a half size up dealing with air maxes (all models)