Hi,
You need to change some in code . Please open to edit /dante/includes/sf-products.php
Find this code at line 142
$image = aq_resize( $image_link, 70, 70, true, false);
Replace with
$image = aq_resize( $image_link, 260, 260, true, false);
Let me know your feedback and share your wordpress admin login detail so i can look in to this .