The brush size you choose will determine the width, shape and hardness of strokes made with such tools as the Pencil Tool and the Paintbrush, whether you choose these tools in the Tool Bar or when Stroking a path.
1. Go to the Window Menu and choose "Show Brushes.
2. The Brushes Palette will appear. Note that there are different sizes to choose from, as well as different hardnesses. On a normal Brushes Palette the first row brushes will appear round. The brushes below have been modified. The numbers below the brushes indicate pixel width.
3. In order to see the width of brushes not marked, or to customize a brush, click on a selected brush.
4. Specify the diameter you want (this will take some experimentation). The degree of hardness will determine whether the brush has crisp or fuzzy edges. Spacing allows you to determine whether your stroke will be continuous or not.
The boxes and diagram at the bottom of the Options box allows you to determine the shape of the brush. We have found that perfectly round strokes end up looking like sausages. We prefer to use a stroke common to calligraphy: an angle of 45% and a roundness of 75%.