Understanding the Shrimp Sizing System
Unlike many other foods, shrimp sizing is based on the 'count per pound,' which is the number of individual shrimp it takes to make up a single pound. The smaller the number on the package, the larger the shrimp. This system is crucial for a chef or home cook, as the size directly impacts cooking time, texture, and how the shrimp is used in a recipe. For instance, large, jumbo, and colossal shrimp are often the centerpiece of a dish, perfect for grilling or a shrimp cocktail, whereas smaller shrimp are better suited for salads, pasta, or stir-fries where they complement other ingredients.
The Relationship Between Shrimp Size and Ounces
To determine how many ounces are 20 shrimp, you first need to identify the size category. The industry uses several labels, but the count per pound is the most reliable measure. A 16/20 count, for example, means you will get between 16 and 20 shrimp per pound. Using this count system, we can calculate the approximate weight of 20 shrimp for various common sizes.
- Colossal (U/15 to 16/20 count): If you buy Extra Jumbo shrimp labeled as 16/20 count, you can expect 20 shrimp to be about a pound, or 16 ounces. Since you're at the upper end of the count range, you might get slightly more or less, but this is a good estimate.
- Jumbo (21/25 to 26/30 count): Jumbo shrimp fall into a category where 20 shrimp will weigh less than a pound. For a 21/25 count, each shrimp is approximately 0.64 to 0.76 ounces. So, 20 shrimp would total between 12.8 and 15.2 ounces.
- Large (31/35 to 36/40 count): In this range, the weight of a single shrimp drops considerably. For a 31/35 count, each shrimp is about 0.46 to 0.52 ounces. Therefore, 20 large shrimp would be roughly 9.2 to 10.4 ounces.
- Medium (41/50 count): At this size, 20 shrimp are likely to weigh well under half a pound. A 41/50 count means each shrimp is approximately 0.23 ounces. In this case, 20 medium shrimp would weigh around 4.6 ounces.
Factors Influencing Shrimp Weight
The most significant factor is the count per pound, but a few other variables can affect the final weight of your 20 shrimp.
Raw vs. Cooked Weight
It is important to remember that shrimp, like other seafood, will lose some weight during the cooking process. This is primarily due to moisture loss. Some estimates suggest shrimp can lose up to 25% of their weight once cooked. A recipe that calls for 16 ounces of cooked shrimp will require more than a pound of raw shrimp.
Shell-on vs. Shell-off
The form in which the shrimp are purchased also makes a difference. Shrimp with the shells still on will weigh more than those that have been peeled and deveined. This is why it is essential to check the labeling to know if the count is based on the total weight with shells or the net weight of the edible meat.
Species and Origin
The species of shrimp can also influence its size and weight. For example, some varieties, like tiger shrimp, naturally grow larger than others. Similarly, the method of farming or wild-catching can affect the final product size. Sustainable aquaculture practices are also becoming a key consideration for many buyers.
Comparison Table: 20 Shrimp by Size
| Shrimp Size Category | Count per Pound Range | Approximate Weight of 20 Shrimp (raw, shell-on) |
|---|---|---|
| Colossal | U/15 | 21.3 - 32.0 oz |
| Extra Jumbo | 16/20 | 16.0 - 20.0 oz |
| Jumbo | 21/25 | 12.8 - 15.2 oz |
| Extra Large | 26/30 | 10.7 - 12.3 oz |
| Large | 31/35 | 9.2 - 10.4 oz |
| Medium | 41/50 | 6.4 - 7.8 oz |
Choosing the Right Size for Your Recipe
The weight of 20 shrimp is a great starting point, but knowing the best size for your dish is what truly elevates your cooking. For dishes where the shrimp is the main attraction, like grilled shrimp skewers or a classic shrimp cocktail, using colossal or jumbo shrimp is best. The larger size makes for a more substantial, visually impressive presentation. For pasta dishes or stir-fries, extra-large or large shrimp are often more appropriate, as they distribute evenly throughout the dish without being overwhelming. Smaller shrimp are a great, budget-friendly option for recipes that incorporate the shrimp into sauces, salads, or bisques.
A note on portion sizes
A standard single serving of cooked shrimp is considered to be 3 to 4 ounces. For a main course, it's often recommended to plan for 6 to 8 ounces of raw shrimp per person. Therefore, if you are making a main course with extra-jumbo shrimp (16/20 count), 20 shrimp would be a good serving for two people, while 20 medium shrimp would serve just one person.
Conclusion
In summary, the number of ounces in 20 shrimp is not a single, universal answer. It depends entirely on the shrimp's size category, which is indicated by its 'count per pound' number on the packaging. Whether you are aiming for a showstopping shrimp cocktail or a quick and simple shrimp scampi, understanding the relationship between size, count, and weight is the key to mastering your seafood recipes. Always check the label, consider the context of your dish, and adjust your cooking times accordingly to ensure a perfect result every time.
- Tip for Shopping: When in doubt, remember the inverse relationship: the smaller the number on the package (e.g., 16/20), the bigger the shrimp. The larger the number (e.g., 41/50), the smaller the shrimp.
For more detailed information on shrimp counts and sizes, explore resources like the Fulton Fish Market Shrimp Sizing Guide.
