Font Size
Important
This package is deprecated. From Unity 2023.2, TextMesh Pro is part of the Unity UI (uGUI) package. For current documentation, refer to TextMesh Pro in the Unity UI package.
Use the <size> tag to adjust the font size of your text.
You can specify the new size in pixels, font units, or percentage.
Pixel adjustments can be absolute (5px, 10px, and so on) or relative (+1 or -1, for example). Relative sizes are based on the original font size, so they're not cumulative.
Example:
<size=100%>Echo <size=80%>Echo <size=60%>Echo <size=40%>Echo <size=20%>Echo

Adjusting font size