ShopLink App allows merchants to link a main product to add-on products based on size variants. When a main product has size variants, a different add-on product can be linked to each size so both items are purchased together. This ensures the add-on is added to the cart at the same time as the main product and integrates seamlessly with the Shopify cart and checkout.

• Link add-on product variants to specific main product sizes using an Admin Block
• Display a dropdown of add-on product variants on the main product page
• Grouped display of main and add-on products in the cart and checkout