Contact Posters are amazing. Too bad that when viewed in the Contacts app, all you see is the person's forehead due to how portraits are framed.
Generally I fill a frame with a person's head and shoulders when taking a picture. I take fewer pictures of people's entire torso. But it seems Contact Posters work best with the latter more than the former.
And the name placement also needs a lot of top space above the subject's head. It's like you have to take a photo specifically meant for Contact Posters for the best results.