Convert from quarter [print] to iron

Unit Definition (quarter [print])
The quarter is a unit of distance equal to 0.25 millimeter. See Q and point.

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".