I've always went by the gap between antlers is 24" this guy is a bit wider so maybe 26. I'd guess his paddles are roughly 12-13 inches wide so put him right around 50".
I'm no expert but would guess 46" to 48". 2nd picture is the only one to use imo. I'm just going by the distance between the eyes being 9-10 inches but like I said definitely no expert here. Will be curious to hear what more experienced guys will say