Chopsticks are small, often tapered, sticks used in pairs of equal length as the traditional eating utensils of China and its diaspora, Japan, Korea, Vietnam and Northern provinces of Laos, Thailand and Burma. Generally believed to have originated in ancient China, they can also be found in some areas of Tibet and Nepal that are close to Han Chinese populations. Chopsticks are most commonly made of bamboo or plastic, but are also made of metal, bone, ivory, and various types of wood. The pair of sticks is manoeuvred in one hand, between the thumb and fingers, and used to pick up pieces of food.