With Product Options also comes Option-Based Stock Control, with which you can assign each separate possible option for your product a separate stock level.
In this guide we will look at how to set up Option-Based Stock Control and assign stock levels to your different Product Options.
To turn on Option-Based Stock Control you will need to go to your "Product Options" tab in your "Edit Product" screen. There you can change the "Option-Based Stock Control" drop-down list to "Yes".
Once you have chosen this option you will need to go to your "Stock Settings" tab to assign your stock.
If you wish to add another option you can simply select "Assign Stock" and add another stock level.