If his ears are 15 its about 3.5-3.75 from the tip of his ear to the outside of his antlers. Plus his antlers being closer to the camera than his ears makes them look wider than his ears. His head is also turned a little left making his left side look wider.

Even if the black line is 18" the red lines are not 6"

If the ears(black line) are 18" then the red lines are about 4.5 which would make him 18"+4.5"+4.5" = 27"

if his ears are 15 the red lines are 3.75.... 15+3.75+3.75 = 22.5"


If the red line on his right side is 6" then the black line which is exactly 4 times longer is 24 inches