The flag of San Marino consists of two horizontal stripes of equal size. The top stripe is white (#FFFFFF) and the bottom stripe is light blue (#5499C7). In the upper left corner, there's a national emblem centered on the white stripe. The aspect ratio of the flag is 3:4.

The national emblem features a shield with three towers on three peaks, each tower topped with a feather. The shield is surrounded by a wreath of oak and laurel leaves, with a scroll below it bearing the Latin inscription "LIBERTAS" (Liberty).

As for geometric properties and measurements, they may vary depending on the specific flag production or usage.