Tie a classic self-tie bow tie in a few steps — it's the same knot as tying your shoes.
Drape the tie around your collar with one end hanging about 1.5 to 2 inches longer than the other. Call the long end A and the short end B.
Cross A over B, then bring A up and behind the cross and through the loop at your neck, creating a simple half-knot. Let A hang down out of the way for now.
Fold end B horizontally to make the front loop of the bow, holding it flat against your collar at the center where the knot will sit.
Bring A straight down over the center of the folded bow, then fold A back on itself and push it through the small loop behind the bow (the gap behind end B).
Gently pull the folded ends and tug the loops to balance both sides. It should look slightly imperfect — a perfectly symmetrical bow usually means it's a clip-on. Straighten until even.