A nice, tight, manageable size knot in a comfortable handle. As with all Simpsons' synthetics, it feels a size smaller than its badger cousin with the same nomenclature. I personally prefer the Simpson Platinum fibre as found in my M7, Chubby 2, and Duke 3 synthetics, but each of those brushes cost considerably more than the Commodore. I know that you are quite fond of the Trafalgar series; perhaps one day you'll be tempted by the Chubby or the Duke. They really are outstanding synthetic brushes.Please, Owen tell me about this beautiful baby!