Maybe I misunderstood the command, but to me \documentclass[50pt]{article} doesn't work. The font size seems fixed no matter what I do the the option. Here is my MWE:
\documentclass[500pt]{article}
\begin{document}
James\\
John\\
\end{document}
the result doesn't change no matter what size I use in the parameter. Maybe i misunderstood the meaning of the argument?
10pt,11pt, or12pt? :-) In fact, these three parameter values are the only choices that the basic LaTeX document classes --article,report, andbook-- are trained to understand. The KOMA-Script document classes --scrartcl,scrreport, andscrbook-- are supposed to be able to handle arbitrary default font sizes if the option is set viafontsize=...in the\documentclassinstruction. However, even the KOMA-Script classes have a practical limit offontsize=136pt. – Mico Jun 06 '20 at 06:45