Giant wood masks are used by Buddhist monasteries and Lamas for rituals and dances that are ritual. Watch this video of Cham Dance to see the variety of masks in action. Masks are also employed by typical visitors to reduce the chances of the eye that is evil bad spirits. You can see masks hanging outside houses and shops. I'm told that each mask possesses symbolism and purpose, but choose usually the one that suits you. All masks tend to be carved into timber, a mainly single pieces of wood.