To resize product images in Magento2,  you just have to add a etc/view.xml into your own theme (f.e. app/design/frontend/Sheldon/Happytheme/etc/view.xml) ans add something like that: <?xml version=”1.0″?> <!– /** * Copyright © Magento, Inc. All rights reserved. * See COPYING.txt for license details. */ –> <view xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:noNamespaceSchemaLocation=”urn:magento:framework:Config/etc/view.xsd”> <media> <images module=”Magento_Catalog”> <image id=”product_image” type=”image”> <width>800</width> <height>800</height> […]