I’m in between a 12 and 11.5 and have slightly wide feet. Got the 11.5s and they fit perfectly.
Owner of an identically sized and shaped pair of stompers over here. For the longest time I just bought 12s for everything, and over the years I've learned how much sizing varies between shoe brands, just like with shirts. When I started paying better attention to my skate gear, I noticed that some shoe brands left a lot of space at the very front of the shoe for me in a size 12, and that made me think about sizing down, so that the very front of the shoe was closer to my toes. Maybe that would lead to a better flick.
Then the exact opposite thing happened when I tried on a pair of Tyshawn Mids, and was told to size up because they ran small. Their 12s fit me perfectly, with no extra space at the very front of the shoe. So I stocked up on those the way everyone else has stocked up on the Tiagos (808 or 1010).
Just my two cents (with Kent Brockman).