If you have a product with multiple variations, such as size or color, you can add option groups to your product.
Adding a new option group will reset pricing and SKU information for existing variants. This is irreversible.
Step 1: Under the products page, select "Various sizes, colors, or materials" and click on "Add/Edit product options".
Step 2: Add product option group name(s) and values.
Option Group Name: This is what shows up in the dropdown during checkout as the default text. eg, Size.
Option Group Values: These are the names for the options. eg, Small, Medium, Large.
Step 3: Add pricing and SKUs. Click Save.