After publishing your changes, new image sizes may not be shown until you regenerate thumbnails. You can do this from the <a href="{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}1$s" target="_blank">tools section in WooCommerce</a> or by using a plugin such as <a href="{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}2$s" target="_blank">Regenerate Thumbnails</a>.