Which ancient civilization pioneered standardized product design with uniform weights and measures, creating the world's first 'brand guarantee' with royal seals on merchandise?

The ancient world was full of remarkable product innovations that revolutionized commerce and daily life. From the Egyptians' sophisticated cosmetic packaging to Roman mass production techniques, ancient civilizations pioneered design principles we still use today. This trivia question explores how one civilization's innovative product design approach influenced global trade and set standards that lasted millennia.

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Mesopotamians, who created uniform clay jar sizes stamped with royal seals to guarantee contents in long-distance trade
Ancient Egyptians, who developed standardized papyrus scrolls with pharaonic seals to verify authenticity
Phoenicians, who marked their purple-dyed textiles with consistent quality grades and merchant emblems
Indus Valley civilization, who created the first uniform brick sizes and pottery marked with trade guild symbols