How can one increase the width of an arrow?

Question

A previous post "How to elongate down arrow?"(How to elongate down arrow?) tells us how to increase the length of the arrow. As a next step, how can one increase the width of the arrow?

Answer 1

Based on the code you linked in your comment (by the way, do not link code but put it in your question):

\documentclass[a4paper,10pt]{article}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\tikzset{
    myarrow/.style={
        line width=3pt,
    }
}
\newcommand{\arrowup}{%
\tikz[baseline=12pt]{\draw [->, myarrow] (0,0) -- ++(0,20pt);}
}
\newcommand{\arrowdown}{%
\tikz[baseline=12pt]{\draw [<-, myarrow] (0,0) -- ++(0,20pt);}
}
\begin{document}
\begin{center}
This is some text.\linebreak
\arrowdown\linebreak
And some more.\linebreak
\arrowup\linebreak
And even more.
\end{center}
\end{document}