pes

The Roman unit of length known as the pes was the basis for their measurement system. This unit was equivalent to approximately 296 mm or 11.65 inches. The pes was further divided into 16 digits or 12 inches, with both divisions resulting in the same length. Larger units were also expressed in terms of the pes, such as the cubitum (1.5 Roman feet) and the passus (5 Roman feet), which was also known as a pace. Itinerary measures included the stadium (625 Roman feet) and the mille passus (5,000 Roman feet), which is equivalent to a mile.1