Why are men's and Women's zippers different?

Lowrise jeans, are designed to expose a considerable amount of the upper body or the torso. The "rise" of a jeans is determined by the distance between the crotch and the waist and is usually around eleven inches on regular pants. In comparison, the average measurement of low rise jeans is roughly seven inches (18 cm), with some as little as three to four inches (7.6–10 cm). Several jeans brands also reflect the rise on the zipper, by creating pants with zippers far shorter than regular pants, usually between 2 and 3 inches, and some manufacturers even provide 1 inch zippers. The latter can also be classified as "Ultra Lowrise Jeans", and the small zipper no longer has its traditional function, but rather becomes a display of fashion, an additional marking of a lowrise pair of jeans.