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OK, where else can you find the size of a U.S. Army Corps of Engineers sandbag and how to fill and stack it, how to measure for a horse collar for pulling a plow, the size and scoring of an archery target, tables for printing font sizes, the temperature rating for different sizes of segar cones used by potters, flange to sensor distances for movie cameras, fire extinguisher classes, the number and size of particles in a cubic foot of air allowed in various types of clean rooms, and on and on and on. All with interesting facts and explanations and lists of units of measure used all around the world and all through history. Sizes.com is a labor of love and just reading the About page made me smile. Then you can start exploring!