You're counting the number of ribs when the neckseal is compressed in the front and the rear is stretched out. The neckseal collapses when you look down like Han and Luke in the photo you photoshopped. If you look at the photo where Luke is looking up at Han or the photo where both Han and Luke are looking forward, you will count 9 ribs and the tenth would be the short rib.
My neckseals have 9mm ribs, the height of the 10 ribs is 83mm. Now if I make a neckseal with the same size of ribs(9mm) and I add 14 ribs at the rear and 7 at the front, you will have a neckseal that measures 50mm at the front and 120mm at the rear. 50mm would not reach the bottom of the adams apple and 120mm would reach up to the same height as the middle of the ear. If you would put the neckseal on a flat surface, the neckseal would look awkward and not tapered. I'm sorry to dissagree but that does not add up to a screen accurate seal.
Efrain