WooCommerce Stock Help Please

Hello everyone. I am using WooCommerce and currently in the process of testing my store.

I am having issues with stock. I would like to only have my stock as T-shirts. Brown-large, Brown-medium, White-large, White-medium, etc.

This way my only inventory to keep up with is the number of shirts i have available. When someone orders a white-medium from one product, the white medium from the other product should change too. OR; The Stock only shows the different shirts i have available.
Would this be possible?

Thank you in advance.