These zipper ties are the most convenient alternative for those who doesn’t have time every morning to tie a knot, they are also ideal for men that don’t know how to tie a knot. A zipper tie is essentially a regular tie with a permanent knot and a zipper mechanism inside it which allows you to adjust the width of the neck accordingly. Tie is 20.5 “in length from the top of the knot to the tip of the tie and 3.25” wide Material: 100% polyester How to use it? Slip the tie around your shirt collar, pull the knot up toward your neck and slide the zipper to adjust it accordingly.