Lay the bow tie over your neck with the sides pointing down. The right side needs to be a few inches longer than the left side.
Thread the left side over the right side, under it and over it again. The long side should now be on the left side.
Fold the short or right side over horizontally into a bow shape. The folded rounded part of the side needs to be on the right side, and the bow-shaped end needs to be to the left side.
Fold the long side over the short side so that it is hanging down vertically. Fold the rounded part of the long side so that it is in a bow shape. Bring the folded long side under and behind the bow, and pass it through the loop behind the short side.
Gently pull the sides to tighten the knot. Make sure that you keep the knot centered as you pull it tight.