how to tie a tie (pratt or shelby knot)
The Pratt (Shelby) Knot
Wide, a full polished knot best suited for spread collar shirts.
Start with the tie inside out, The wide end "A" under the narrow end "B".
Take wide end "A" over and under narrow end "B".
Pull the loop down and tighten.
Take wide end "A" over to the left.
Pull wide end "A" up, behind the loop.
Bring wide end "A" through the knot and gently tighten. The tip of "A" should touch your belt buckle.