It looks like a WooCommerce update is messing up the Product Gallery element. Before I had the image filling its container but now it is only taking up 48% of the space. In digging through the dev tools in my browser the following rule is what is messing it up, as it has higher specificity than the Themeco style that sets the image to not float and 100% width.
WooCommerce CSS that has higher specificity
.woocommerce #content div.product div.images, .woocommerce div.product div.images, .woocommerce-page #content div.product div.images, .woocommerce-page div.product div.images {
float: left;
width: 48%;
}
Themeco CSS that is being overridden
[class*="woocommerce"] div.x-wc-product-gallery div.woocommerce-product-gallery {
float: none;
width: 100%;
}
Can you update the theme CSS to be more specific so that it goes back to the previous behavior.