The Windsor knot, also sometimes referred to as a full Windsor to distinguish it from the half-Windsor or erroneously as a "double Windsor", is a method of tying a necktie around one's neck and collar. The Windsor knot, compared to other methods, produces a wide triangular knot. The knot is named after the Duke of Windsor (Edward VIII after abdication), however the Duke himself did not actually use a Windsor knot. The Duke preferred a wide knot and had his ties specially made with thicker cloth in order to produce a wider knot when tied with the conventional four in hand knot.
In Ian Fleming's James Bond series, the British spy remarked that the Windsor knot was "the mark of a cad."