The size of the font, based on the sizes set in any word processor. To change the Size of the font, highlight it in the Project View and you have a number of options in the Import Settings in the Inspector A Unity window that displays information about the currently selected GameObject, asset or project settings, allowing you to inspect and edit the values. Supported Font formats are TrueType Fonts (.ttf files) and OpenType Fonts (.otf files). To add a font to your project you need to place the font file in your Assets folder. Unity has many built-in components, and you can create your own by writing scripts that inherit from MonoBehaviour.
A GameObject can contain any number of components. Fonts can be created or imported for use in the Text Mesh Component A functional part of a GameObject.