How did the Egyptians make sure that every measuring stick was the same length?

The ancient Egyptians ensured uniformity in their measuring sticks by creating a standard unit of measure based on a specific reference, often using a physical prototype as a benchmark. They employed a standard cubit rod, typically made from durable materials like wood or stone, which was carefully calibrated to a set length. Additionally, they used local workshops and standardized production methods to minimize variations, and they periodically checked and replaced measuring sticks against the established standard to maintain consistency across their measurements.