Artists Value Profile Watercolour Brushes. These are the ultimate synthetic watercolour brushes. Crafted from a blend of differing hair diameters, they give a combination of colour holding, precision and endurance. Ranging from a 4/0 to a 24 in round and 1/8" to 2" in flat, it is the most comprehensive range in the Artists Value series. Here, you are sure to find a suitable size for your purpose. Click on the style of brush you are looking for to view products available.