If you are not using a logo, or you decide to use the logo with the text-based site title, you can change the title size.

screenshot of the site title font size setting
  1. Go to Appearance > Customize > Site Identity
  2. Look for the Site Title Font Size setting.
  3. Move the slider to increase or decrease your logo image size.
  4. Click the Publish button.

To revert the site title size back to the default setting, click on the small circular arrow icon next to the slider.