Fun World Costumes Get ready for a screaming good time with this Ghost Face Mask with Knife Adult Halloween Accessory. It features one latex-constructed ghost mask packaged with a plastic knife. Just add the clothing of your choice and have some trick-or-treating or costume party fun. The Halloween ghost mask comes in one size that fits most adults. It s ideal for anyone needing a quick and easy costume and is a throwback to the popular movie franchise Scream.