What is the packing volume of the twelve-bone umbrella?

The packing volume of the twelve-bone umbrella is 55cm. According to relevant public information, the umbrella with 12 bones is only increased to 12 bones on the basis of the original eight bones and ten bones, and the whole skeleton becomes more stable and coordinated, effectively resisting strong winds and calmly coping with heavy rains. Although it is big, it is very stable.