hi in another thread, you stated that in order to make a product page full width (without sidebar):
The image attachment page which is what you linked uses the default "post" template provided by the theme. The theme does not come with a template for the images by itself so you will need to create one that is full width, name it "image.php" and put into the themes main folder on your server.
You can make a copy of the themes page.php file and remove the sidebar from it as an easy way to do this. is the default image attachment page. Wordpress will use the post template if you don't provide a special template for images. However you can create a special template for images. Eg make a copy of page.php, modify the file (remove the sidebar, etc.) and call it image.php (important, don't change the name). Then place it into the theme directory where single.php, archive.php, etc. can be found. See also. http://www.wpbeginner.com/wp-themes/how-to-create-a-custom-single-attachments-template-in-wordpress/
Can you please tell me how exactly to copy the page.php to create a new one called image.php? I believe it is in the Theme Editor but I'm not sure exactly how to do it and I don't want to mess up the existing files.