Unit Definition (cape rood)
The cape rood is a traditional unit of distance in South Africa, equal to 12 Cape feet or 12.396 English feet (3.7783 meters).

Unit Definition (iron)
The iron is a traditional unit measuring the thickness of leather used in making shoes, especially the soles of the shoes. One iron is equal to 1/48 inch (0.5292 millimeter), so a sole 1/4 inch thick is described as "12 iron".