Demo of products page which has 3 columns and is full width. The above ‘cover image’ is inside content area. Ideally, you can keep the ‘Shopping Cart icon’ and page ‘Headline section’ enabled on top as seen on Shop 3 cols page with sidebar, but as an example on this page, you can choose to keep that hidden too.

This page was built using a single WooCommerce shortcode, the settings for which are done as easy as point and click from the page editor.