Hello,
1) To change the size of the product thumbnails go to WooCommerce > Settings > Product > Display > Image settings > product thumbnails size and don’t forget to regenerate thumbnails after changes(use Regenerate thumbnails plugin). Read more about image sizes https://docs.woocommerce.com/document/fixing-blurry-product-images/
2) Our theme doesn’t have the vertical gallery. It’s possible to implement only by additional customization. This service is not included in our support but you may contact WPKraken team to get help with this.
Regards