How many oysters is a portion? Your guide to serving sizes
                                
                                
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                                    3 min read                                
                            
                                According to the U.S. Food and Drug Administration (FDA) nutrition data, a standard 3-ounce serving of shucked oysters is equivalent to approximately 12 medium-sized oysters. However, this dietary guideline can vary significantly depending on the oysters' size, preparation method, and whether they are an appetizer or a main course.