Product Listing Page Main Image Size

CS-cart has two image size options regular and big but I am looking for something in the middle, possibly with an add-on.

Example size and layout :

https://www.ebay.com/itm/Cool-Autumn-MA1-Pilot-Bomber-Jacket-Flying-Tigers-Flight-Thin-Jacket-Coat-Mens-9/173689092047?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Df9ae010c4e0448d8ba516251a43dd043%26pid%3D100675%26rk%3D3%26rkt%3D15%26sd%3D233046561887%26itm%3D173689092047&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A0b6fea0a-1de9-11e9-98f5-74dbd180f859%7Cparentrq%3A7346a7461680a9ca392feae8ffe9dd78%7Ciid%3A1

Have you experimented with these settings?

Have you experimented with these settings?

No I have not I thought those settings were only for thumbnails not main image

No I have not I thought those settings were only for thumbnails not main image

Try increasing 280 to 320

No I have not I thought those settings were only for thumbnails not main image

Although I couldn't set the image size I wanted I was able to make the images about 25% larger.

Thanks for the tip much appreciated.