4 oz deck of cards
I still go by the deck of cards description, which is usually 3- 4 oz of meat. I usually have 1 portion for breakfast, 1 portion for lunch and 1.5 to.
That " deck-of-cards " reference you have probably heard from a dietitian? Deck of cards sized meat is about three ounces, which is by USDA.
golf ball. 3 oz chicken or meat. = deck of cards. 3 oz fish. = checkbook. 1 oz lunch meat. = compact disc. 3 oz muffin or biscuit. = hockey puck. 1½ oz cheese. Clash Royale