Hi Alex,

1. I've set header spacing and here is how I did it:

(view large version)

2. Done, I've set the following code in functions.php and it made it working:

// Products Original Image Size
add_filter( 'single_product_large_thumbnail_size', create_function( '$size', 'return "large";' ) );

Please note that the custom code I've added for you, needs to be backed up before updating the theme, otherwise you will loose your changes. Only in functions.php you have some custom code, and that is:

// Facebook Button
function my_fb_button_header_right() {
?>
<a href="https://www.facebook.com/rodererverlag/" target="_blank" class="rodererverlag-facebook-btn">Facebook</a>
<?php
}

add_action( 'aurum_header_top_bar_right_after', 'my_fb_button_header_right' );

// Products Original Image Size
add_filter( 'single_product_large_thumbnail_size', create_function( '$size', 'return "large";' ) );
add_filter( 'laborator_wc_product_loop_thumb_size', create_function( '$size', 'return "large";' ) );