Here are two ways to make them look great without using findings (which is nice if you have run out or are budgeting).
1. Forget the clasp. Make an adjustable sliding clasp, instead. I added artificial pearls at the ends to make the knot easier to open and close.
If you are making a necklace as a gift and are unsure of the length necessitated, an adjustable sliding clasp is perfect.
|Sliding knot clasp|