Check out example codes for "latex font sizes". It will help you in understanding the concepts better.

Code Example 1

\Huge
\huge
\LARGE
\Large
\large
\normalsize (default)
\small
\footnotesize
\scriptsize
\tiny

Code Example 2

\Huge
\huge
\LARGE
\Large
\large
\normalsize
\small
\footnotesize
\scriptsize
\tiny

Learn ReactJs, React Native from akashmittal.com