Brushes come in a variety of shapes and sizes, and brush sizes can differ between manufacturers. This article explains brush numbering systems that appear on the handle of paintbrushes.
Silver Brush : Black Round Mop : Series 5618S : Size 20
Da Vinci Squirrel Mix : Series 5590 : Size 8
Testing the Willow Wolfe Callia Brushes for Mixed Media - Jackson's Art Blog
Testing the Willow Wolfe Callia Brushes for Mixed Media - Jackson's Art Blog
Review of Jackson's Procryl Brushes - Jackson's Art Blog
Art Overview - Eddie Jackson
Da Vinci Kolinsky Sable : Series 1203K : Ultra Fine Liner : Size 6
Brushes Archives - Jackson's Art Blog
Understanding Brush Sizing Systems - Jackson's Art Blog
Understanding Brush Sizing Systems - Jackson's Art Blog
Review of Jackson's Procryl Brushes - Jackson's Art Blog
Two Painters Test Jackson's Watercolour Brushes - Jackson's Art Blog
Jackson Brushes - WetCanvas: Online Living for Artists