How do I handle the amount I have in stock for each size??
I tried combinations attributes, but even if I put the stock quantity to 0 it allows me the same to buy the product variant
sorry for my bad english
In Product Variant Info tab (while editing your variant) make sure that in "Manage inventory method:" you select "track inventory by product attributes". Check example: http://admin-demo.nopcommerce.com/Admin/ProductVariant/Edit/58