I went into a flea market today and ended up picking up a fatboy, a Crabtree & Evelyn brush and a Plisson brush. How do I figure out what size the Plisson brush is? How does their numbering system work?
The smaller the number, the smaller the size of the brush. A size 12 is a 22mm brush, a 14 has a 22mm knot but a longer loft than a 12. A 16 is a 24mm brush and so on, you should be able to find a chart on Plisson's website. I'm not sure what you have but it looks like one of the lower grades of hair, probably about a size 10. Measure the knot diameter and the loft and you should be able to figure out what it is.