Product Additional Info
You can display additional information, like shipping terms or size chart on product pages.
To setup additional information accordion for products, open Theme Editor (Shopify Admin > Themes > Customise), select 'Product Pages' from the dropdown located in the top area, then click on 'Product Page' section.
Click on 'Add content' button to add a new content block that will be displayed in a tabs section on product pages.
There 3 types of blocks that you can use in this section: Product Description, Text, HTML, Page content (include any page that is created in Shopify Admin > Pages) and Shopify Product Reviews.
By default, the content blocks are displayed on all product pages. You can specify a block to be displayed only for a product that has a specific attribute. For example, if you want to display a Size Chart for only products that have 'size' attribute, simply type 'size' in 'Related Attribute' field while editing the block.