Ok, I took a look, the size is correct at 120x100px. As mentioned in my last reply the Slim Plus image requires a specific image size for its layout to stay intact so Connections will auto create the required image size on demand.
Larger images is possible but would require editing the template and it PHP and CSS files in order to accommodate the larger image.
Isee you’ve purchased the cMap template, that seems like a good fit for the site and its designed to allow for larger images. Will that work?