How to tie the Windsor (Double Windsor) knot. Wide and Triangular. A full knot best suited for spread collar shirts. 1. The wide end "A" should extend about 12 inches below narrow end "B". Cross wide end "A" over narrow end "B". 2. Bring wide end "A" up through loop between collar and tie; then back down. 3. Pull wide end "A" underneath narrow end "B" and to the left, and back through the loop again. 4. Bring wide end "A" across the front from left to right. 5. Pull wide end "A" up through the loop again. 6. Bring wide end "A" down through the knot in front. 7. Using both hands, tighten the knot carefully and draw up to collar.