Vannamei Shrimp Buying Guide: Sizes, Grades & Specifications

Introduction to Vannamei Shrimp

Vannamei shrimp (Litopenaeus vannamei), also known as Pacific white shrimp or whiteleg shrimp, is the most widely farmed and traded shrimp species in the world. It accounts for approximately 75% of global shrimp aquaculture production, with major farming regions in Thailand, Indonesia, India, Ecuador, and Vietnam.

For buyers, understanding vannamei shrimp specifications is essential to ordering the right product, comparing supplier quotations accurately, and meeting your end-market requirements. This guide covers everything a professional seafood buyer needs to know — from count sizes and product forms to quality grading and pricing factors.

Understanding Shrimp Count Sizes

Shrimp are sized by "count" — the number of individual shrimp per pound (454 grams). The lower the count number, the larger the shrimp. This is the universal sizing standard used in international seafood trade.

Standard Vannamei Shrimp Size Chart

• U/8 — Under 8 pieces per pound. Colossal. Rarely available in vannamei; more common in black tiger.
• U/10 — Under 10 per pound. Jumbo size, premium pricing.
• U/12 — Under 12 per pound. Extra large, popular for high-end food service.
• 13/15 — 13 to 15 per pound. Large size, strong demand in Western markets.
• 16/20 — 16 to 20 per pound. The most popular commercial size globally. Versatile for food service and retail.
• 21/25 — 21 to 25 per pound. High-demand mid-range size. Excellent for restaurants, stir-fry, and pasta dishes.
• 26/30 — 26 to 30 per pound. Medium size, popular in price-sensitive markets and for mixed seafood products.
• 31/40 — 31 to 40 per pound. Smaller size, commonly used in salads, pizza toppings, and fried rice.
• 41/50 — 41 to 50 per pound. Small shrimp, often used for cocktail shrimp and processed products.
• 51/60 and smaller — Used primarily for dried shrimp, shrimp paste, and low-cost processed items.

When comparing quotations from different suppliers, always confirm whether the count is based on gross weight (with glaze) or net weight (without glaze). This single distinction can change the effective price by 15–30%.

Product Forms Explained

Vannamei shrimp is processed into numerous product forms, each suited for different end uses. Here are the most common forms traded internationally:

HOSO — Head-On, Shell-On

Whole shrimp with head and shell intact. Popular in Asian, Middle Eastern, and Mediterranean markets where consumers prefer to cook shrimp whole. HOSO shrimp are typically IQF (individually quick frozen) or block frozen.

HLSO — Headless, Shell-On

Head removed, shell intact. The most widely traded shrimp form globally. HLSO is the benchmark product that most pricing references are based on. Yield from HOSO to HLSO is approximately 62–68%.

PD — Peeled & Deveined

Shell and vein removed, tail off. Ready for cooking without further preparation. Commonly used in food service and retail. Available in raw or cooked forms. Yield from HLSO to PD is approximately 52–58%.

PUD — Peeled, Undeveined

Shell removed but vein left intact. Lower processing cost than PD. Used in markets where deveining is less of a concern.

PDTO — Peeled & Deveined, Tail-On

Shell and vein removed but the last tail segment is left on for presentation. The preferred form for tempura, cocktail shrimp, and plating in restaurants.

CPTO — Cooked, Peeled, Tail-On

Fully cooked, peeled, and deveined with tail on. Ready to eat or use in cold preparations such as shrimp cocktail and salads. Premium pricing due to additional cooking step.

Butterfly Cut

Shrimp is split along the back and opened flat. Used for tempura, grilling, and premium retail packaging. Available raw or cooked.

Quality Indicators for Vannamei Shrimp

When evaluating vannamei shrimp quality, professional buyers look at the following characteristics:

• Color uniformity — Raw vannamei should be translucent grey-white to light pink. Reject lots with excessive dark spots, black heads (melanosis), or yellowing.
• Texture — The flesh should be firm and resilient. Mushy or soft texture indicates quality deterioration or improper handling.
• Odor — Fresh frozen shrimp should have a mild, clean ocean smell. Any ammonia or off-odors indicate spoilage before freezing.
• Shell integrity — For HOSO and HLSO, the shell should be intact without cracks, soft spots, or excessive shell disease marks.
• Uniformity of size — Within a given count range, the individual pieces should be reasonably uniform. Poor size grading (mixing small and large in the same count) is a common quality complaint.
• Glazing — A thin, even glaze of 10–15% is standard for quality protection. Excessive glazing (over 20%) artificially inflates the gross weight and reduces the buyer's net product value.
• Deveining quality — For PD and PDTO forms, the vein should be fully removed without excessive cutting into the flesh.
• Foreign material — No pieces of shell, antennae, legs, or other foreign matter in peeled products.

Freezing Methods

The freezing method significantly impacts product quality, appearance, and pricing:

IQF — Individually Quick Frozen

Each shrimp is frozen individually in a blast tunnel or spiral freezer, then glazed and packed. IQF shrimp are free-flowing and can be portioned without thawing the entire pack. This is the premium freezing method and commands higher prices.

Block Frozen

Shrimp are arranged in a pan with water and frozen as a solid block, typically 2 kg (4.4 lb) blocks. More common for HLSO in Asian markets. Lower freezing cost but the buyer must thaw the entire block to use the product.

Semi-IQF

Shrimp are frozen in a single layer without water, resulting in pieces that lightly touch but can be separated without full thawing. A cost-effective middle ground between IQF and block frozen.

Packaging Standards

Standard packaging configurations for export:

• Retail IQF bags — 250g, 500g, 1 lb, or 2 lb resealable bags for consumer retail.
• Food service packs — 1 kg or 2 lb IQF bags, packed 10 per master carton (10 kg or 20 lb).
• Block packs — 6 x 2 kg blocks per 12 kg master carton, or 5 x 4 lb blocks per 20 lb carton.
• Bulk IQF — 10 kg or 20 lb bags for reprocessors who will repack into their own retail formats.

Private label packaging is available for buyers who want their own branding, including custom artwork, labeling in multiple languages, and retail-ready formats.

Pricing Factors

Vannamei shrimp pricing is influenced by multiple factors:

• Size — Larger count sizes (U/10 to 16/20) command premium prices. Smaller sizes (41/50+) are significantly cheaper.
• Product form — HLSO is the baseline. PD costs more due to labor. CPTO costs even more due to the cooking step.
• Origin — Thailand and Indonesian shrimp are typically priced higher than Indian or Ecuadorian shrimp due to perception of quality and certification compliance.
• Certification — ASC, BAP, or organic certified shrimp carry a premium of 5–15% over conventional product.
• Global supply and demand — Seasonal production cycles, disease outbreaks in farming regions, and changes in consumer demand all affect spot market prices.
• Currency exchange rates — Since shrimp is priced in USD internationally, exchange rate movements affect landed costs for non-USD markets.

Sourcing Vannamei Shrimp from Thailand

Thailand is one of the world's top vannamei shrimp exporters with a well-established industry infrastructure. Thai vannamei shrimp are known for:

• Strict government oversight by the Department of Fisheries (DOF)
• Comprehensive certification coverage (HACCP, BRC, EU, FDA, BAP, ASC)
• Advanced processing technology and consistent quality
• Strong traceability from farm to finished product

Hanuman Seafood supplies a full range of vannamei shrimp products including HOSO, HLSO, PD, PDTO, CPTO, and value-added forms. All products are processed in our HACCP/BRC certified facilities and exported through Laem Chabang and Bangkok ports.

Request a Quotation

Whether you need a full container of 16/20 HLSO vannamei or a trial mix of retail-packed PD shrimp, our export team is ready to assist. Contact us with your specifications and target market, and we will respond with a detailed quotation within 24 hours.

Related Seafood Resources

• Frozen Shrimp Supplier Guide: Vannamei vs Black Tiger — Full species comparison for importers
• Frozen Seafood Warehouse Storage Guide — Cold chain requirements by product type
• Frozen Blue Swimming Crab Buyer's Guide — Indonesian supply, grades, pricing
• Ambient Seafood OEM Thailand — Private label OEM capabilities
• Request a Quote — Free sample + pricing within 24 hours

Related Resources for Shrimp Buyers

• Frozen Shrimp Supplier Guide: Vannamei vs Black Tiger for Importers — Head-to-head comparison across price, size grades, flavor, and market fit
• Frozen Vannamei Shrimp Prices 2026 — Thailand FOB Guide — Current HOSO, HLSO, PD, and PDTO pricing with size count breakdown
• How to Import Frozen Seafood: Complete Buyer's Guide 2026 — Regulations, documentation, cold chain, and supplier vetting
• Seafood Distributor Margins & Pricing Strategy — How to build and protect margin when sourcing frozen shrimp
• Buy Vannamei Shrimp from Hanuman Seafood — Certified Thai vannamei shrimp in all grades, FOB Bangkok, MOQ 20 MT