He spent much time glueing all the pieces together, spraying the mask white to give it its skeletal look, and adding the black colour to the nose, eyes and mouth. The final 3D printed Jack Skellington mask weighs over 1.3 kg (3 lbs). It took him over 100 hours to 3D print all 29 parts of the Jack Skellington cosplay costume. Let it be the Jack Skellington costume. This video gives us a lot of insight into the costume designs for the show.