Create a variation:
1.On your seller account page, under Inventory, click Add a Product.
2.On the Add a product page, click Create a new product.
3.On the Create a new product: Classify page, select the category of the product you want to sell. Click Select.
4.On the Vital Info page, fill in the required fields marked with an asterisk (*).
5.In the Variation Theme drop-down menu, select the type of variation you want to add. Select the most inclusive variation theme that you think you’ll need. Once you have created a product with a selected variation theme, you will not be able to change it.
Note: Even if you are not ready to sell certain variation combinations, you should add all the possible variations now. This will make it easier to manage the displayed products and quantity available to sell.
6.When you have finished adding possible variations, click the Add variations button. A Variations Matrix appears, allowing you to add more detail for each variation combination. A UPC/EAN is required. Although not required, a Seller SKU will be automatically generated for you if you do not add one.
7.On the Offer tab, enter offer information (for example, handling time and delivery method) for your product. This information will be copied automatically to each variation that you create. You can modify the offer information, as needed, for each variation.
8.On the remaining tabs, you can add images, a product description, keywords, and product attributes. This information will appear in all variations of the product you want to sell. You can edit product information at any time on the Manage Inventory page.
10.When you have finished adding your product and its variations, click Save and finish.