This is one of those techniques from the way-back machine, but I have to say I had totally forgotten how to do it! Thank you so much to Jean Campbell over at Beading Daily for posting a wonderful tutorial on How to Tie a Sliding Knot.
This type of knot makes the bracelet a little more adjustable because you can push the knots out (away from each other) to tighten the bracelet, and move them together to make it larger. One issue with bracelets is getting the size exactly right since most women will wear anything from a 6 1/2 inch to an 8 inch bracelet. The diameter of the beads can also affect the overall fit of a bracelet, so the sliding knot trick is very handy to create bracelets that can fit a range of wrist sizes.