First you have to place the button between your thumb and index finger. The clasp of the bracelet will now be on the bottom of the wrist.
Secondly, you need to start wrapping the bracelet around your wrist by crossing the top of your hand from your thumb to your little finger. Continue to wrap your wrist 3 or 5 times (depending on the bracelet).
Finally, at the other end of your wrap bracelet, you'll find a number of knotted holes that allow you to choose the length that best suits your wrist. Keep the end of the bracelet with the holes in place as you bring the button to it. Slide the button through the hole that suits you best! And that is how you wrap a wrap bracelet 😊
Still not quite clear, take a look at the following video: