The following steps will help you increase the size if Chrome address bar font size too small:
Open Google Chrome on your computer.
On the menu, click Settings.
On the Google Chrome settings page, type font and tap enter.
In the appearance options, choose the font size you prefer.
Choose to customize the font option for further font size adjustments.
With this, the customize font option will allow changing the font size, which means the base size of the website.