Hi alexalincatrinoiu,

Thanks for reaching to us.

First of all, I’m really sorry have taken long time to reply you.

1. For the Product Archive page, please navigate to Theme Settings > Product archives -> Products styles, here you can enable Even product grid for desktop option to align products if they have different height components.

2. Basically the product images are controlled by WooCommerce and the WoodMart theme doesn’t influence this. The size of the thumbnail you set should be larger than the size of the product thumbnail displayed on the shop page. If the thumbnail size is smaller than what the default size expects, it may appear blurry or not display correctly.

You can find the sizes used on the demo here:
https://xtemos.com/docs/woodmart/faq-guides/image-size-content-alignment-product-grid/

and Regenerate thumbnails using the appropriate plugin. https://wordpress.org/plugins/regenerate-thumbnails/

Here is the WooCommerce Manual:
https://woocommerce.com/document/fixing-blurry-product-images/

Best Regards.