How to adjust my leather necklace?

To make the necklace shorter, take hold of one of the knots, then gently pull on one of the two center cords to find out which one is the one that slides through the knot you are holding. Shorten the necklace to the desired length and then move the other knot along so that the two back cords are the same length.

To make the necklace longer, slide the knots back towards each other. Most of the time you can do this by pulling at the individual cords on the sides, but if the knots are tighter than usual, it may be better to hold onto the knots and move them individually.

Importantly! Please take care not to pull the knots right next to each other on the back, as it can be hard to shorten the necklace again.  Leave at least half an inch between the knots.