Just a general comment on the sizing of the UBs.
I wear and 11 in Nike running shoes... bought an 11 and 11.5 in my core blacks and initial wore the 11 because it felt like a good fit. After a day in the shoes the top of my foot had a red indentation and my big toe was hurting from being so close to the edge of the toe box. Wore the shoes for a couple of days because from what I read on the forums they stretch, but I experienced no stretching or signs of them getting looser.
Switched to the 11.5's, there is no pain no redness and they are really comfortable to wear. I tested this out with both my navys and creams and found this to be consistent. I would recommend a .5 up from your regular Nike size. This could be a personal fit, but know that there are always sizing questions and wanted to share my experience.