List all available paper sizes for a specific TeX Live program

Manage paper size options of an TeX Live installation.
More information: <https://www.tug.org/texlive/tlmgr.html>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

tlmgr {{pdftex}} paper --list

click the source code to copy install tlmgr paper on any operating system with command-not-found.com