Zipperstop Wholesale YKK&reg; SALE 7" Zipper YKK Color 501 White #3 Skirt & Dress (50 Zippers / Pack) Zipperstop Wholesale YKK 50 zippers YKK Color 501 White 7" YKK #3 Skirt & Dress Strong yet lightweight zipper for slacks, skirts and dresses. These are nylon zippers with plastic teeth and a metal slider. Overall length is 8 1/2" Inches (21 cm), actual zipper part measures 7"