Our invisible infrastructure is our weights and measures. The US uses units that were defined in medieval times, and reformed by the British in the 19th century. Our invisible infrastructure is an anarchy of incompatible pre-metric units, which cost Americans about a sawbuck per day. For over a decade, Randy Bancroft P.E., writing as The Metric Maven, has written essays which detail how the obsolete way we measure and quantify produces unnecessary errors, wastes resources and labor, and reduces our industrial competitiveness. On the tenth anniversary of The Metric Maven blog, a collection of the most important essays, which delineate the costs and difficulties we in the US experience because we have not switched over to the metric system, are presented. From how our antiquated rulers, dating methods, paper sizes, shoe sizes, and more, cost US citizens, to the lives which have been lost and endangered by archaic feral units are explored in this essay collection.