Slideshow should show different sizes

You create a Slideshow and filter only for Post Types: Media. The Media images can be uploaded in different sizes with different widths. But the option setting for dimension width is only for all images. To get rid of disturbing space for smaller images than others, add this CSS to your Customizer:

.cat-post-item {
    max-width: min-content !important;
    width: initial !important;
Slideshow with different image sizes
The items have different item width but will be adapt to each of their own width.