The Jack Skellington Halloween costume is totally a home-made costume. I made the tie out of cardboard, fabric and paint. For the jacket I bought a used blazer and attached tattered coat tails on to it.
For the pants I wore tight-fitting thermal athletic pants, making me appear taller and lankier. I wore a plain white undershirt and attached the tie to that shirt with paper clips. I covered my hair and skin in white hair spray paint, and used black make-up for the eyes and mouth.