If you're looking for a costume idea, here are some of the best! ... If you want to make your own, the original website has design specifications

An American Werewolf in London make-up sculpture...

I believe this gory sculpture is a replica of the actual make-up used by Rick Baker for Griffin Dunne as the murdered 'Jack Goodman' in 1981's An American Werewolf in London.

Special effect make-up sculpture from
An American Werewolf in London
An American Werewolf in London make-up sculptureAn American Werewolf in London make-upAn American Werewolf in London sculpture
The sculpture was created by Howard S . Studios, who produce prototypes and production masters for toy manufacturers and producers of high-end collectables, plus special one-of-a-kind commissions for individual collectors.

Rick Baker won the Best Make-Up Oscar for his work on this classic horror movie in 1982, which was the first year the Academy Award for this category was introduced.