Tie guide - Windsor 

The Windsor knot has a thicker triangle knot than for example the Four in hand-knot. The Windsor knot only goes with a cut away collar and is primarily suitable for a tie in silk. The knot is not particularly common in today’s society, but it has been, back in the days. There is a myth that it is the Duke of Windsor (Edward VIII) who created the Windsor knot, but this is not true. However, he preferred to have a wider knot, and he used ties in a thicker quality, so his Four in hand-knot looked thicker, hence the myth.