While this recipe calls for cod, you could use any mild, flaky white fish fillets as long as you adjust the cooking time to reflect the variable thickness. Another thing you might want to adjust is how much of the chipotle in adobo you use. I ate sitting next to a fire extinguisher, this being my first time making the dish. (YOWZA!) Anyway, I had about a pound (16 oz) of fish and when all was said and done, ended up with 4 patties each about 3-3.5" in diameter. We had them as part of a moderate meal with baguette slices and a simple salad. If you make many smaller versions, you could serve them as appetizers.