How to make custom sizes for example images?

Question

I found this very post on available example images What images are generally available for use in MWEs? , but could not find the size I need. I am looking for a wide-aspect image that matches the size of a teaser figure (e.g. ACM sigconf) which would be around 16x3. The aspect ratios I could find were:

example-image-10x16.png
example-image-16x10.png
example-image-16x9.png
example-image-1x1.png
example-image-4x3.png
example-image-9x16.png

Is there a way to generate a wider one?

p.s. I am using overleaf, so some of the commands like searching through what is available to me is not so convenient, so I apologize if it is in that list of 1400 images.

Answer 1

You don't really need to use an example image with a specific size to print one on a document, because you can always specify the width and height of an image you include with \includegraphics. Of course, the "Image" text will be distorted, but that doesn't really matter for an example image.

\documentclass{article}
\usepackage{graphicx}
\begin{document}
\begin{figure}
\includegraphics[width=\linewidth, height=.1875\linewidth]{example-image}
\end{figure}
\end{document}