You can add multiple variants to your product. After you add variants to a solo product, the main product becomes a parent product. The variant products becomes its child. You can add variant product through a solo product or a parent product as per your requirements.
In the Products Listing page, the default view displays both solo products and variant products.
To add variant product:
Click the PRODUCTS tab. The Products Listing page displays solo products and variant products.
Click for the solo product you want to add variants.
Click Add a variant product.
Select a property to create the variant, and then click Add.
Enter the equivalent product id.
Enter the equivalent product name.
Enter the values for the variant property. For example, if color and size is your variant property, enter values for color and size.
Click Create Product Variant. The product now becomes a parent product with one child variant.
To add another variant product, click Create another product variant, and then repeat steps 2 through 8.
Click Save Product.
To add a variant product through a parent product, do the following:
Enable the Group by Parent toggle. The Products Listing page displays parent products and solo products.
Click for the parent product you want to add variants.
Click Create another product variant.
Select a property to create the variant, and then click Add.
Enter the equivalent product id.
Enter the equivalent product name.
Enter the values for the variant property. For example, if color and size is your variant property, enter values for color and size.