I have had many requests and here they are.  MrTieDye Tie-Dye Silk Ties.  I dyed the fabric and had the ties made from it. They are already 'tied' and have a 24 inch Velcro strap to fasten them around your neck.

This tie is 22-3/4 inches long from the top of the knot to the point.  At the widest part it is 4 inches wide.