bolo tie
A thin cord or braided strap, fed through a decorative clasp and secured around the neck in place of a necktie. Commonly associated in the US with Texas and other Western US fashion. Also known as a spaghetti tie.
Not to be confused with cross ties, which are made out of a wider strap of fabric and commonly shorter than bolo ties; nor neck ribbons, which rather than being held together with a clasp are simply tied in a bow.