If he had eye guards he'd be a nice one...

I have little experience judging animals like this, but I estimated his ears at 22" or so, and the antlers appear to spread a good 6" past them on either side, putting him at roughly 34", outside spread, frame only.
I did a rough measurement on the screen and the math put him closer to 38, but I don't think he's that big. I've always been just ok at math.