Zippers by the Yard contain 4 yards of zipper chain and 16 color-coordinated extra-large pulls*. This packaging enables you to make single-slide or double-slide zippers of any length (up to 144") with little waste, saving money and time. Here's why we prefer these zippers: Dress and skirt zippers carried by most local stores are too small. The #4.5 size is just the right size for purses, bags, and totes.