Hello, David,
Thank you for getting in touch with us.
The size of product images settings are configured through the WooCommerce plugin and cannot be imported together with the demo content. Please read this article – https://xstore.helpscoutdocs.com/article/89-product-images Go to Appearance > Customize > WooCommerce > Product Images > select Uncropped and regenerate thumbnails – https://wordpress.org/plugins/regenerate-thumbnails/
We hope this information is helpful.
Kind Regards, 8theme team
