Why text looks bigger than setting?

Some browsers have initial minimum font size settings. If you set smaller font size on a text than that setting, the text will be shown bigger. If you want to use smaller font size, please change your browser's settings.

Google Chrome

[Preferences] - [Customize fonts]  in "Appearance" - change setting of [Minimum font size]

Safari

[Preferences] - Under "Advanced", change setting of [Never use font size smaller than]