Store Listing Product Size

Hello team,

I’m the developer of the Greenmart theme.
https://themeforest.net/item/greenmart-organic-food-woocommerce-wordpress-theme/20754270

We have a problem with product image size on the “Store Listing” page. The product image uses the size of the blog, making it very bad. We cannot adjust the blog size to fit it because it affects the display of our blog page.
https://prntscr.com/1vsnxw3

We need that image to get the size of the product ‘woocommerce_thumbnail’
=> The displayed image will be better and not cut corners

The page I need help with: [log in to see the link]