Hello,
First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :)
Basically, the product Images are controlled by woocommerce and our theme doesn’t influence them. Woocommerce provides settings for the images that you can find under Appearance >> Customize >> Woocommerce >> Product Images.
You can read our detailed documentation in the following link:
https://xtemos.com/docs/woodmart/faq-guides/image-size-content-alignment-product-grid/
Best Regards.