blick brush size chart All Blick Economy, Scholastic, Academic, Studio, and Master brushes are manufactured by hand to be uniform in size and approximately match the charts below. Brush width is measured on the hair just above the ferrule and sizes have been rounded to the nearest 1/32". Refer to these charts when choosing Blick brand brushes only. Round Brush Diameter Chart Flat, Bright, Filbert, Egbert Brush Width Chart 4/0 (less than 1/64") 3/0 (1/64") (31/32") 24 2/0 (less than 1/32") 0 (1/32") 1 (less than 2/32") (13/16") 20 2 (2/32") 4 (3/32") 6 (4/32") (11/16") 18 8 (5/32") (9/16") 16 10 (7/32") 12 (9/32") (15/32") 14 14 (10/32") (12/32") 12 16 (12/32") (10/32") 10 18 (15/32") (8/32") 8 (6/32") 6 20 (9/16") (5/32") 4 (3/32") 2 24 (11/16") (1/32") 0