Absolute Font Sizes
Command	Example	Result
\tiny	$$\tiny 3x$$	$\tiny 3x$
\small	$$\small 3x$$	$\small 3x$
\normalsize (default)	$$\normalsize 3x$$ or just $$3x$$	$\normalsize 3x$
\large	$$\large 3x$$	$\large 3x$
\Large	$$\Large 3x$$	$\Large 3x$
\LARGE	$$\LARGE 3x$$	$\LARGE 3x$

\huge and \Huge are not supported by the mimeTeX filter