Center Feature image on Category page

I am using Cloud templates and would like to center the feature image that is displayed on our category page. This is currently using Post Loop Block. Please advise.

https://dev.districtadministration.com/category/web-seminars/

Screenshot frontend: https://www.screencast.com/t/deSNpg6Y3Wc
Screenshot backend: https://www.screencast.com/t/V6npViDkQ8

We need to set a max width and also have this centered. How do you suggest we accomplish this? Thank you.

I was able to resolve this by adding some CSS. By adding the CSS I am able to control the size and still have the image centered.

/*—-Cateogry Images Centered—*/
.category-web-seminars .tdi_86 .td-image-container {
margin-left: auto!important;
margin-right: auto!important;
}