Get a piece of ribbon and some scissors
Fold the ribbon into a cancer loop
Pinch the middle of the cancer loop together to form a bow shape
Cut an even smaller piece of the ribbon, make sure it's way skinnier than the bow
Rap the skinny piece of ribbon around the middle of the bow and make it stick with glue of nail polish
This is what you should have, a small bow..
Now put glue on where ever you want the bow on to your sunglasses! Enjoy!!