Zipperstop Wholesale YKK&reg; 5" Zipper YKK #3 Skirt & Dress ~ Black (12 Zippers / Pack) ZipperStop Wholesale Authorized Distributor YKK 5" Zipper YKK #3 Skirt & Dress ~ Black (12 Zippers / Pack) Black #580 Strong yet lightweight zipper for slacks, skirts and dresses. These are nylon zippers with plastic teeth and a metal slider. Overall zipper length is 6 1/2", actual zip part is 5".