Fish Maw Head Count (頭數) Sizing Chart & Metric Weight Conversion
Standard converter for fish maw head count: traditional Cantonese catties (600g/500g), pieces per kg, single piece weights, and commercial pricing tiers.
Understanding the traditional 'head count' (頭數) concept
In Chinese dried seafood trade, 'head count' indicates how many dried pieces weigh exactly one catty. Because a catty is a fixed unit of weight, fewer heads means larger individual pieces (e.g., a 10-head maw is far larger and more valuable than a 50-head maw).
Hong Kong catty (司馬斤: 600g) conversion table
Under the Hong Kong standard (1 catty = 604.79g, rounded to 600g): 10-head = 60g/pc; 15-head = 40g/pc; 20-head = 30g/pc; 30-head = 20g/pc; 40-head = 15g/pc; 60-head = 10g/pc.
China mainland market catty (市斤: 500g) conversion table
Under the Chinese mainland standard (1 market catty = 500g): 5-head = 100g/pc; 10-head = 50g/pc; 20-head = 25g/pc; 25-head = 20g/pc; 50-head = 10g/pc; 100-head = 5g/pc.
Modern metric specifications in international B2B contracts
To prevent international disputes between differing regional catty definitions, export contracts should strictly specify weight in grams per piece (e.g., 'Grade AA: 40g–60g per piece, average 20 pieces/kg').