70 centimeters. 77 cm clothes need 70 cm long zippers. Zipper zipper is also called zipper. It is one of the top ten inventions that facilitate people's lives in modern times. It is a connector that combines or separates articles through continuously arranged chain teeth. Zippers are composed of chain teeth, sliders, upper and lower stops (front code and back code) or locking pieces, and are now widely used in clothing, bags, tents and so on.