Variants in Combobox

Is there currently a way to add variants in a combobox or something similar? For example, let's say I have a t-shirt with sizes from X-Small to LL-Large. I'm not too keen on adding 7 or so variants (which includes 7 different "add to cart" buttons) to my productinfo screen...

Thanks in advance.

I think you may add a product attribute "Size" instead of the variant for each size.
You can present attribute as you wish - combobox, or radiobutton.

Thanks, exactly what I was looking for.