Increasing the fontsize in a TikZ picture beyond \HUGE

Question

I am using the follow code to create name signs for my students. How can I increase the size of the font beyond \Huge? I'd like to scale the size of the word without scaling the whole picture.

\documentclass[12pt,ngerman]{scrartcl}
\usepackage[left=1cm,right=1cm,top=1.5cm,bottom=0.5cm,a4paper]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{pgffor}
\usepackage{tikz}
\usepackage{xcolor}
\usetikzlibrary{positioning}
\pagestyle{empty}
\setlength{\parskip}{0pt}
\begin{document}

\foreach \x in {Donald Tiberius Duck,Mickey Sherlock Mouse}{
\begin{tikzpicture}
[mybox/.style={rectangle,black,xshift=0cm,yshift=0cm,minimum width=0.99\textwidth,font=\Huge\bfseries,draw=black,very thick,align=center, minimum height=0.475\textheight}]
\node at (0,0) [mybox] {\x};
\node at (0,0.475\textheight) [mybox] {};
\end{tikzpicture}\clearpage}

\end{document}

Answer 1

You can use \fontsize{50}{60} in font=\fontsize{40}{48}\bfseries, with a scalable font (\selectfont is needed if no \bfseries is used.). With \usepackage{lmodern} you get

\documentclass[12pt,ngerman]{scrartcl}
\usepackage[left=1cm,right=1cm,top=1.5cm,bottom=0.5cm,a4paper]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{pgffor}
\usepackage{tikz}
\usepackage{xcolor,lmodern}
\usetikzlibrary{positioning}
\pagestyle{empty}
\setlength{\parskip}{0pt}
\begin{document}

\foreach \x in {Donald Tiberius Duck,Mickey Sherlock Mouse}{
\begin{tikzpicture}
[mybox/.style={rectangle,black,xshift=0cm,yshift=0cm,minimum width=0.99\textwidth,font=\fontsize{40}{48}\bfseries,draw=black,very thick,align=center, minimum height=0.475\textheight}]
\node at (0,0) [mybox] {\x};
\node at (0,0.475\textheight) [mybox,] {};
\end{tikzpicture}\clearpage}

\end{document}