Zipperstop Wholesale YKK 4" Zippers YKK Color 501 White #3 Skirt & Dress (50 Zippers / Pack) -MADE IN USA Zipperstop Wholesale YKK 50 zippers YKK Color 501 White 4" 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 5 1/2", actual zipper part measures 4".