Board Thread:General Discussion/@comment-24764132-20191028075510/@comment-168424-20191106031643

So for Wikitext image sizing, something like 200px will try to set the width to 200px and maintain the aspect ratio, x50px will try to set the height to 50px and maintain the aspect ratio, and 200x50px will try to set width to 200px and height to 50px.

See Help:Images at MediaWiki.org.