Hi jim-1334,
To add the Featured Image Size option you really need to hire a developer as it will be the new feature for the theme but if you want to show the featured image as wide then please go to ‘Appearance > Customize > Additional CSS’ and paste the below custom CSS code.
.post-boxed.inlined .post-img-wrap,
.site-footer .widget-area .newscard-widget-recent-posts .post-boxed .post-img-wrap {
height: auto;
}
.post-boxed.inlined .post-img-wrap:before {
display: block;
padding-top: 70%;
}
Thanks