I have come to the conclusion that for NA 1s, grab your normal size. For Chicago and jumpman treatments go a half size up, they fit tighter. Same with KO's. Go that half size up.
If I had to go through what I had to go through for the royals.... I went a half size up and they look funny on me. No one wants to size swap so to eBay they go.... So sad. it's hard seeing your grails go. ):
Not sure if this is just me... do the 1s with the jumpmans on the heel and tongue fit different from the OG 1s? I wear a 10.5 and my Chicagos 1s fit very snug so I went up to a sz. 11 on the royals and they were alot looser, making me want a 10.5. is this common?