Variants quantity.

Please, on the product quantity, how can i attribute different quantities to different variants. For example, 10 item for small size, 15 items for medium size and 10 items for large size? It only lets me put a total quantity. I might have the product in stock but i might already be out of a certain size and i don't want to receive an order of a product i don't have.

Once you add the characteristic to your product, click on the "manage variants" button in order to edit each variant and set its quantity.