7″ Metal Trouser Zipper is available in 9 colors! The listed zipper length is determined by the length of the top stop to the bottom stop. The tape extension is not considered in the measurement. Metal Zippers are the oldest type of zipper and are commonly found in purses, jeans, and trousers. They are suitable for applications with thicker fabrics. Our Trouser Zippers are size 3, non-separating metal tooth zippers.