Adjust the Length
Adjust the length of the bow tie. As a general rule, add 20 inches to the desired neck size. For instance, for a 15½″ neck size, I would adjust the tie so it is 35½″ long overall when you hook the two pieces together. You may need to fine-tune the length if it’s too long or too short when you tie the knot.
In the last step, you’ll tie the knot.