A Peça (Portuguese) (also boa peça, peça da India), in Spanish Pieza de India ("piece of India") was a unit of value during the 16th to 18th centuries used in the slave trade between the Spanish colonies in the Americas and slave traders operating from West Africa through the Portuguese Cape Verde Islands. A peça was used to measure quotas and to assess tariffs. Broadly speaking one peça equated to one healthy male or female slave between 15 and 25 years of age; slaves between 25 and 35, and between 8 and 15 years were valued at 2/3 peça with those outside this age range and those infirm being valued lower.