Our theme doesn’t control product images size. It is controlled by WooCommerce plugin. You can configure it in Appearance -> Customize -> WooCommerce -> Product images.
I kindly recommend you preparing images with titles you want before uploading them to your media library using the graphic editor (Photoshop or any other) to have a nice-looking grid.
Thank you.
This is difficult because the image size in shop is ok, the problem is only for the product carousel that is part of the theme. On one product tab I may use 3 column and on another 6. And I dont want to change the product image size because then it will not be displayed correctly on shop page….
I suppose I will have to prepare images before uploading as you suggested, but that will be a lot of work, not so practical.