How to Choose the Right Brush Size

Artist brushes usually have numbered sizes, although there is no exact standard for their physical dimensions. Brushes with the same number from different brands can easily differ in size. Let’s clear things up.

Brush Numbering

Brushes are usually numbered. The most common sizes range from 000 to 20. But there are also special larger and smaller sizes. Some large manufacturers make brushes as fine as 30/0, but this is not a standard size.

From smallest to largest, the sizes are:

20/0, 12/0, 10/0, 7/0, 6/0, 5/0, 4/0 (also written 0000), 000, 00, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 22, 24, 25, 26, 28, 30.

However, these numbers may not be entirely reliable. Each brand and brush shape can vary in thickness and width for a given number. Believe it or not, both brushes in the photo are size no. 10. Admittedly, the difference is not usually this extreme; we chose these two brushes specifically to illustrate the point.

If you’re buying brushes from a catalog or online and aren’t familiar with the brand, check whether the actual brush width is given in inches or millimeters. Not all brands use only a number to indicate brush size.

Knowing the Width Isn’t Enough

Brushes with the same number vary not only in width but also in thickness. Here’s an important detail: in addition to the width, you should carefully consider how many bristles the brush has. If you prefer painting with watercolor and fluid paints, a thick brush holds considerably more paint. This lets you paint smoothly for longer without stopping. If, on the other hand, you’re a fan of the dry brush technique, a brush that holds less paint and has fewer bristles may suit you better.

Ultimately, you can’t rely on the numbered size markings completely. Although widths for a given number shouldn’t vary too much, it’s best to check the exact width in millimeters or inches directly with the manufacturer. To give you at least an approximate idea, we’ve put together a table with all the information you need in one place.

We hope these tips help you choose the right brush and enjoy painting.

Best,

Majka

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