That's what I used since some I saw sort of looked funny at least to me. I even measured several pics of mickey heads on some websites and measured not only the diameter of the head and ears, but even the angle of the ears to the vertical diameter of the head and smallest horziontal distance between to two ears to approximate where the ears should go on the head. Finally before cutting anything I tied some string about the base of each ear and carefully put them on the head to see how the placement looked. Below are pics of my Mickey head in it's halloween and Xmas mode. These are my lampost at home since I made a second head for the house.
This Xmas I might use a green vs. the white in the Xmas mode since the white is sort of bright since I have a 13W CFL in both the head and each ear. Even with the isolation of the base of the ears to the head, just the light from the head sort of washes out the red at the base of each ear when you see it in person. The pic looks better than seeing it in person.
Larry