The drum body is mostly made of brass, and some are made of aluminum alloy or wood. The appearance is similar to a jar with a small mouth and a big belly. The drum bottom is small, the upper part is the largest diameter of the drum body, and the top drum mouth is slightly adducted.
Darma has two sizes, big and small drums
The big drum is called Damaqie, also known as Xiong Dama or Bass Dama. The drum height is 30 cm to 34 cm, the diameter of the drum surface is 37 cm to 41 cm, the maximum diameter of the upper part of the drum body is 45 cm to 50 cm, and the diameter of the drum bottom is 15 cm to 18 cm. There is a sound hole with a diameter of 1.5 cm in the center of the drum bottom.
The small drum is called Dama poor, also known as female Dama or high-pitched Dama. The drum height is 16 cm to 20 cm, the diameter of the drum surface is 29 cm to 32 cm, the maximum diameter of the upper part of the drum body is 31 cm to 34 cm, and the diameter of the drum bottom is 12 cm to 12 cm. 16 cm, the diameter of the small sound hole in the middle of the drum bottom is 0.6 cm.

The upper drum surface is covered with yak leather. The skinning time is generally better in September of the Tibetan calendar, because at this time the yak grows the fattest and the leather is the best. The skin is made of yak hide that was slaughtered that day, and the skin is moist and easy to stretch. There are a number of small holes around the drum skin, and a whole thin yak leather strip is inserted into the small holes and reciprocatingly connected with the drum bottom aprons to tighten and fix. Loosening or tightening the leather straps can adjust the tension of the drum head and change the pitch of the drum.
The outer surface of the copper drum body is mostly coated with silver powder. The drum is made of wood, the length of the drum is 30 cm, the head of the drum is slightly thick, and the end of the drum is slightly thinner and decorated with red silk strips.