What is the standard brush length? Common sizes are: 10 mm, 20 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm. 1⁄8 in,1⁄4 in, 3⁄8 in, 1⁄2in, 5⁄8 in, 3⁄4 in, 7⁄8 in, 1 in, 11⁄4 in, 11⁄2 in, 2 in, 21⁄2 in, 3 in, 31⁄2 in, 4 in.
How many inches is a size 12 brush? Size 12 brushes are 12/32” wide (9.5 mm).
How is brush diameter measured? The size of a circular brush is measured from the bristle end to bristle end, also known as the diameter of a brush. Please include the bristle section, not just measure the central barrel.
How do you read a brush size? The size of a brush is indicated by a number printed on the handle. Brushes start from 000, then go to 00, 0, 1, 2, and up. The higher the number, the bigger or wider the brush. Unfortunately, there is little consistency between brush manufacturers as to what these sizes actually are, so the size of a No.