Deciphering Shrimp Sizing: Count Per Pound Explained
When browsing the seafood counter, the numbers on a bag of shrimp, such as 16/20 or 21/25, can be a source of confusion. However, these numbers represent a simple and standardized way of grading shrimp size. The count-per-pound system indicates the average number of individual shrimp it takes to make up one pound of product. The smaller the numbers in the range, the larger the individual shrimp. Conversely, a larger number range, such as 51/60, signifies smaller shrimp because it takes more pieces to reach the one-pound mark. Some labels may also feature a 'U' followed by a number, like U/15, which means "under 15 per pound" and denotes an extra-large, or colossal, size.
This simple system allows consumers to make precise decisions based on their recipes, portion sizes, and cooking methods. For instance, a recipe calling for larger shrimp as a centerpiece will fare better with a lower count-per-pound number, while a pasta or soup dish may be better suited for smaller, higher-count shrimp. Understanding this grading is the first step toward becoming a more confident and informed seafood shopper.
Comparing 16/20 and 21/25 Shrimp
To answer the primary question, the 16/20 shrimp are bigger than the 21/25 shrimp. You get fewer individual shrimp per pound with the 16/20 count, which means each one is larger and meatier. This distinction in size has a direct impact on how you should cook and serve them.
What the Numbers Mean
- 16/20: This label indicates that there are between 16 and 20 shrimp per pound. These are often categorized as "Extra Jumbo" or "Super Jumbo" and are noticeably substantial in size.
- 21/25: This label means you will find between 21 and 25 shrimp per pound. These are typically classified as "Jumbo" and are still sizable, but slightly smaller than the 16/20 count.
Size and Culinary Application
The culinary uses for each size vary based on their heft and cooking time. The larger 16/20 shrimp are perfect for dishes where the shrimp are the star attraction, while the 21/25 shrimp are more versatile.
Common Uses for 16/20 Shrimp:
- Grilling or skewering
- Main course centerpieces
- Elegant shrimp cocktail
- Broiling or stuffing
Common Uses for 21/25 Shrimp:
- Pasta dishes like shrimp scampi or alfredo
- Stir-fries and curries
- Soups and chowders
- Tacos and quesadillas
Comparison Table: 16/20 vs 21/25 Shrimp
| Feature | 16/20 Shrimp | 21/25 Shrimp |
|---|---|---|
| Individual Size | Larger, more meaty | Slightly smaller |
| Count Per Pound | 16 to 20 shrimp | 21 to 25 shrimp |
| Category Name | Extra Jumbo, Super Jumbo | Jumbo |
| Best For | Grilling, skewers, main entrees | Pasta, stir-fries, cocktails |
| Approximate Cook Time | 3–4 minutes for sautéing or boiling | 2–3 minutes for sautéing or boiling |
Nutritional Profile of Shrimp
Shrimp is a lean, protein-rich food that offers numerous health benefits, making it an excellent addition to a balanced nutrition diet.
Busting the Cholesterol Myth
For many years, shrimp's high dietary cholesterol content raised health concerns. However, modern dietary guidelines and extensive research have debunked this misconception. For most people, the amount of cholesterol in food has a minimal effect on blood cholesterol levels. The more significant factors are genetics and the consumption of saturated and trans fats. Since shrimp is low in saturated fat and contains beneficial polyunsaturated fatty acids, it's a heart-healthy choice when prepared without excessive butter or frying.
Key Nutrients in Shrimp
- High Protein: A 3-ounce serving of cooked shrimp provides around 20 grams of protein, essential for muscle repair and growth.
- Low Calorie: A 3-ounce serving typically contains less than 100 calories, making it a satiating low-calorie option.
- Omega-3s: Shrimp contains omega-3 fatty acids, which are beneficial for heart and brain health.
- Rich in Minerals: It's a great source of selenium, phosphorus, copper, and zinc.
- Astaxanthin: This antioxidant, which gives shrimp its pink color when cooked, has anti-inflammatory properties.
Cooking Methods for Different Shrimp Sizes
Whether you choose the larger 16/20 or the versatile 21/25, the key to great-tasting shrimp is not to overcook them. The cooking time will vary with size. Here are some ideal cooking methods:
- Boiling/Poaching: A great method for a simple shrimp cocktail. Use a pot of salted water and plunge cooked shrimp into an ice bath to stop the cooking process. Jumbo (21/25) shrimp take about 2–3 minutes, while extra jumbo (16/20) take slightly longer, around 3–4 minutes.
- Sautéing: Pan-searing in a hot skillet is quick and adds great flavor. For 16/20 shrimp, cook for 3–4 minutes, and for 21/25 shrimp, cook for 2–3 minutes, flipping halfway through.
- Grilling: This method works best for larger, heartier shrimp like the 16/20 count, which are less likely to fall through the grates. Thread them onto skewers to make them easier to handle.
Sustainable Shrimp Choices
As you incorporate shrimp into your diet, consider its sustainability. Both wild-caught and farmed shrimp have environmental impacts, and making an informed choice is important.
- Wild-Caught Concerns: Industrial trawling can result in bycatch of other marine life and can damage the ocean floor.
- Farmed Shrimp Concerns: Some farming practices, especially historically, led to habitat loss and water pollution.
- Making a Sustainable Choice: The best practice is to look for certifications from reputable organizations. For example, the Marine Stewardship Council (MSC) certifies wild-caught fisheries that operate sustainably, and the Aquaculture Stewardship Council (ASC) certifies responsible farmed seafood. You can find more information on sustainable seafood choices at the Marine Stewardship Council website.
Conclusion: Making the Right Shrimp Choice
Ultimately, the choice between 16/20 and 21/25 shrimp depends on your culinary goals. If you need a large, impressive centerpiece for grilling or cocktails, the 16/20 is the superior choice. If you're preparing a pasta, stir-fry, or a dish where the shrimp are one component among many, the versatile 21/25 size is an excellent option. Regardless of the size, shrimp remains a highly nutritious, low-calorie protein source that can be part of a healthy diet, especially when prepared with minimal added fats and sourced sustainably.
