12 oz. Molds only hold 10 fl oz. Liquids. It's literally at the top, so the only thing you can count on is 9 fl oz. without making a huge mess every time you use them. Otherwise, however, they are exactly what you would expect when buying a casserole dish. Well packaged to avoid damage in transit, consistent quality of all shapes in the set. Smaller volume isn't the end of the world, but the item's description should accurately state the item's capacity.
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