Start with the broad end hanging further down on the right. Pass the broad end over the narrow end.
Pull the broad end underneath then over the loop around you neck.
Pass the broader end under the narrow end.
Pull the broad end over then underneath the outer layer of the loop around your neck.
Now take the broad end and pass it around the knot.
Pass the broad end up from below and behind the knot and through the loop around your neck.
Pull the broad end underneath the outer layer of the knot.
Carefully adjust the knot, holding it gently and pulling the narrower end.
The Full Windsor
