How can I change the font size of the authors and the affiliation in Latex?

How can I change the font size of the authors and the affiliation in Latex?

I have something like this:
\documentclass[11pt,a4paper, twocolumn]{article}
\begin{document}
\font\myfont=cmr12 at 16pt
\title{{\myfont MY TITLE}}%Title in 16pt
\author{MY NAME}% **I need it in 12pt**
\affil{University of...}% **I need it in 10pt**
How can the font sizes be changed?