Exactly. I have a size 8 head and new era snaps fit me fine but I think that they're pretty tacky. And people in general think that as far as team snaps go if its not mitchell and ness or ti$a then its a piece of shit.
New Era snapbacks are very weird/tacky in my opinion. All they did was get a fitted and cut out a hole in the back to attach a snap. Mitchell & Ness is pretty tacky as well, but atleast they tried the whole duck bill and green under (which is gone now). The only good-looking snapbacks out there are the actual vintage snapbacks, or the vintage "retros" that stays true to the older snapbacks made by various brands such as Adidas, Reebok, American Needle, Starter and etcetera. I collect a lot of the vintage snapbacks because I love the design and curve not to mention the awesome quality. In my honest opinion, people with big heads should sort of stay away from snapbacks. No hate or anything, but snapbacks look terrible when they're on their last two snaps; shits about to pop off any second. If you have a big head and can only fit into New Era snapbacks, I would just recommend wearing fitteds in general. But that's just my 2 cents. Just do you fam!