How many centimeters is a 9-inch folding fan?

9-inch folding fan 29.97 cm. The total length of folding fan is generally defined by the old unit "inch". Generally speaking, the most conventional folding fan size is 90/20, that is, the overall length of the folding fan is 9 inches, and the width of the air outlet is 2 cm. According to the length unit, one inch is 3.33 cm and nine inches is 9×3.33=29.97 cm.

Folding fan is also called unfolding fan, paper fan, pinch fan, folding fan, folding fan, gathering fan, gathering fan and cyclone fan. It is a foldable fan, with bamboo or ivory as the fan bone and tough paper or silk as the fan surface; When using it, it must be scattered, semi-regular and scattered. Folding fans first appeared in the recorded history of China in Jiankang (now Nanjing) in China in the 5th century. The Book of Southern Qi says, "Chu Yuan covered the sun with a waist fan." According to the explanation in Tong Zhu Jian, "waist fan" is a folding fan.