The Visual Guide: How big is a 3 oz serving of fish?
                                
                                
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                                    4 min read                                
                            
                                The American Heart Association recommends consuming at least two 3-ounce servings of fish each week to promote heart health. But for many, visualizing an accurate serving size without a food scale can be challenging. So, **how big is a 3 oz serving of fish**? Luckily, there are a few simple tricks using common household objects to help you estimate.