Meant to post yesterday, but be wary of NFG MFG rn. You may be getting smaller wheels than the ones you bought.
I ordered 56mm Vee shape Production Seconds and they ended up being an average of 54.5mm. One of the wheels also had two fat grooves that deformed the riding surface.
I don't know if the grooves are only found in the Production Seconds (as this is more than a cosmetic defect) but from emailing NFG and speaking to a friend that rides a lot of NFG, the wrong wheel sizing is consistent along all the wheels.
I don't mean to shit on NFG MFG since the wheels they put out are REALLY great, but I wish they were more transparent about this on their website as there's no mention of this problem. I'm still riding the wheels and they're great (especially for the price if you don't mind an ugly wheel). I hope they manage to fix this issue soon.
Until then, I'd personally buy one size bigger than the one you want (ie if you want 56mm, buy 58mm), or bug your local and measure them in person :v
Side note: buy calipers if you want to enter a whole new level of gear madness.