Because shrimp weight varies greatly, the number of shrimp in a 3-ounce quantity might also vary. Shrimp are sold by the count, which indicates how many shrimp weigh one pound. For example, “jumbo” shrimp may be 16 count, which means each one weighs 1 ounce.
“Large” shrimp are usually 31/40 count, which indicates one pound contains 31 to 40 shrimp. This translates to about two or three shrimp per ounce of weight, or six to nine shrimp in a three-ounce portion. In addition, shrimp lose weight when peeled and cooked, so a 3-ounce serving may require nine or more cooked, large shrimp.
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