2 piece clothing item


we’re selling bikini on our website and I would like to know what’s the best way to set up that kind of item for inventory tracking. For example, when users want to buy a bikini, we want them to be able to select the size for the top (S, M, L, XL, etc) and also select the size for the bottom (S,M, L, XL ,etc.) So someone could buy a Large top and a small bottom. We added two options (Top Size and Bottom size) and this works fine. The problem is inventory tracking. There is no way to create a combination just tracking tops and one for just tracking bottoms. We don’t want to have to create two separate products, that would not be user friendly enough. Any idea anyone ?

Thanks in advance.

Jean Ouellet