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How to Change the Brush Size in Illustrator

In this tutorial, you'll discover how to change the paintbrush size in Illustrator, and how to make the eraser smaller in Illustrator.
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Today, I'm going to show you how to change the brush size in Illustrator, how to use the stroke settings to change the size of the blob brush, and how to change the eraser brush size in Illustrator.

Follow along with us over on our Envato Tuts+ YouTube channel:

Tutorial Assets

The following assets were used during the production of this Adobe Illustrator tutorial.

What You'll Learn in This Illustrator Brush Tutorial

  • How to change the brush size in Illustrator using keyboard shortcuts
  • How to change the brush stroke in Illustrator
  • How to change the blob brush size in Illustrator
  • How to change the eraser brush size in Illustrator

1. How to Change the Brush Size in Illustrator Using Keyboard Shortcuts

Step 1

Let's select the Brush tool in the Tools panel and create a stroke.

Creating a brushstrokeCreating a brushstrokeCreating a brushstroke

Step 2

Now we can use a brush size shortcut in Illustrator. To change the brush size in Illustrator, just press and hold [ (bracket key) to decrease the size, or ] to increase the size of the brush.

changing the brush size using the bracket keychanging the brush size using the bracket keychanging the brush size using the bracket key

2. How to Change the Brush Stroke in Illustrator

Another way to adjust the brush size in Illustrator is to change the Stroke. Just select your stroke and change it in the top panel. 

changing the size of the brush by changing the stroke settingschanging the size of the brush by changing the stroke settingschanging the size of the brush by changing the stroke settings

This method works well with custom brushes.

different stroke sizes of custom brushdifferent stroke sizes of custom brushdifferent stroke sizes of custom brush

3. How to Change the Blob Brush Size in Illustrator

If you want to change the blob brush settings, Illustrator allows you to do it in a few ways. You could use the brush size shortcut in Illustrator, as we did before, or Double-Click on the Blob Brush Icon and change the brush settings in Illustrator to fit your needs.

changing the blob brush sizechanging the blob brush sizechanging the blob brush size

If you want to learn more about the blob brush settings in Illustrator, check out this amazing tutorial:

4. How to Change the Eraser Brush Size in Illustrator

If you want to know how to increase the size of the eraser in Illustrator, here's the answer! You could do it using the same methods as mentioned before: use the Adobe Illustrator brush size shortcuts [ ] or adjust the brush size by Double Clicking on the Eraser Tool icon and then adjusting the Adobe Illustrator brush settings to your needs.

changing the size of the eraser toolchanging the size of the eraser toolchanging the size of the eraser tool

3 Amazing Brushes From Envato

As you can see, it's pretty easy to change the Adobe Illustrator brush settings, the size especially. You could use an Adobe Illustrator brush size shortcut, change the size in the brush settings panel, or increase/decrease the stroke settings.

If you like the custom brushes we've used here, check them out on Envato:

1. Charcoal Collection (AI)

With this download, you'll get a set of 50 charcoal brushes for Adobe Illustrator. They're all vector and were originally designed on paper with real charcoal. It doesn't get more realistic than this.

Charcoal Brushes for Adobe IllustratorCharcoal Brushes for Adobe IllustratorCharcoal Brushes for Adobe Illustrator

2. CHEMIST Illustrator Brushes (ABR, AI)

Try out this set of 35 textured, grain, cartoon, and stipple brushes for Illustrator. Moreover, this download includes 10 retro texture stipple brushes for Photoshop. Easily customize the width and color of each stroke, and let your creativity do the rest.

CHEMIST Illustrator BrushesCHEMIST Illustrator BrushesCHEMIST Illustrator Brushes

3. Graphic Beats: Illustrator Brushes (AI)

If you're looking for a huge bundle of Illustrator brushes, this is it. There are no less than 330 vector brushes and 330 vector symbols in five different artistic categories. You won't run out of options with this outstanding pack.

Graphic Beats is a set of Illustrator brushesGraphic Beats is a set of Illustrator brushesGraphic Beats is a set of Illustrator brushes

If you want to learn more about brush settings in Illustrator, check out these amazing tutorials: