How to - Cowboy knot

Fold your scarf into a triangle

then fold the long edge over, about 5 inches wide

gather the ends together

and bring behind your neck

cross the ends..

pull tighter..

.. and bring them forward

From here, you can proceed in many different ways. You can tie the ends into a criss-cross knot, basic slide, vertical basic slide, slip knot, cross slide etc. The pictures below show just some of the many possibilities!

With a 90 carré and a Moyenne scarf ring in the basic slide:

With a cashmere GM and an Annneau Infinity in a slip knot:

 

With a cashmere GM and a Grande Classique in a vertical basic slide:

With a cashmere GM and a shawl ring in a criss-cross knot:

With a 90 carré and a Grande Classique in the basic slide:

with a 90 carré, ends secured with an Anneau Infinity in the cross-slide: