By default, when your WooCommerce Linked Variation settings are set to display product images, the image shown on the browser is a cropped version of your original image, referenced internally as shop_thumbnail.

If you’d like to display the full image or use a custom image size instead, you can use the iconic_wlv_linked_variation_image_size filter. Below is an example code snippet that displays the full image size:

function iconic_wlv_linked_variation_image_size() {
	return 'full';
}

add_filter( 'iconic_wlv_linked_variation_image_size', 'iconic_lv_change_image_size' );

In this example, the callback function returns full as the image size. WordPress provides several default image sizes, which include:

• thumbnail
• medium
• large
• full

You can modify the snippet to use any of these sizes or any custom image size that you’ve registered using the add_image_size function.

To apply this snippet, you can add it to the functions.php file of your child theme or use a plugin like Code Snippets for easier management.