[Tex/LaTex] Any easy way to change the section font size in a LaTex article

Question

The default section head font size is 17, and subsection is 14. Any simple way to change them to, say 16 and 13? Just the size, nothing else.

I've googled for solutions and those I find are either too complicated or do not work.

Answer 1

These lines in your preamble should do the trick:

\usepackage{titlesec}
\titleformat*{\section}{\fontsize{16}{20}\selectfont}
\titleformat*{\subsection}{\fontsize{13}{17}\selectfont}