如何更改 tikz 中箭头的大小

Question

我无法更改箭头的大小，因为当我<->在此处使用 MWE时，它会采用默认大小

 \documentclass[a4paper]{article}
 \usepackage[margin=1cm,bottom=1cm]{geometry}
 \usepackage{tikz}
 \usepackage{graphicx}
 \begin{document}
 \pagenumbering{gobble}
 \begin{center}
 \begin{tikzpicture}

 \draw (36mm,-0.5mm)--(36mm,0mm)--(36mm,25.4mm)--(36mm,26.9mm)--(37mm,26.9mm)--(37mm,25.4mm)--(40mm,25.4mm)--(40mm,23.9mm)--(37mm,23.9mm)--(37mm,0mm)--(37mm,-0.5mm);

 \draw[|<->|] (34mm,25.4mm)--node[sloped,midway,above]{\scalebox{0.4}{1.5mm}}(34mm,26.9mm);

 \end{tikzpicture}
 \end{center}
 \end{document}

下面是上述 MWE 的输出

Answer 1

下面是使用该arrows.meta库和特定（任意）长度的一个版本：

 \documentclass[a4paper]{article}
 \usepackage[margin=1cm,bottom=1cm]{geometry}
 \usepackage{tikz}
 \usepackage{graphicx}
 \usetikzlibrary{arrows.meta}
 \begin{document}
 \pagenumbering{gobble}
 \begin{center}
 \begin{tikzpicture}

 \draw (36mm,-0.5mm)--(36mm,0mm)--(36mm,25.4mm)--(36mm,26.9mm)--(37mm,26.9mm)--(37mm,25.4mm)--(40mm,25.4mm)--(40mm,23.9mm)--(37mm,23.9mm)--(37mm,0mm)--(37mm,-0.5mm);

 \draw[|<->|,>={Classical TikZ Rightarrow[length=.25mm]}] (34mm,25.4mm)--node[sloped,midway,above]{\scalebox{0.4}{1.5mm}}(34mm,26.9mm);

 \end{tikzpicture}
 \end{center}
 \end{document}