You'll need to invent a unique sku (Stock Keeping Unit) for each product we're handling. Sku's can be a mix of letters and numbers, without spaces, around 12 characters or less. If your product has an official UPC, you should use that for your SKU instead of creating one.
Let's say you've got a shirt called 'Bird on a Wire' that comes in red and black, mens and womens, sizes S-XL. That's a total of 16 skus. A good way to create them is like so:
So your 16 sku's might be:
For each SKU, you also need to enter a title, such as 'Bird on a Wire T-Shirt', and a Description ('Mens Medium'). Creating unique skus that hold to a pattern will make your life much simpler as your business grows!
If two of these methods overlap and you create duplicate SKUs, you can run our SKU De-Duplicator
The SKU De-duplicator is also accessed in your Account > Preferences Menu.