We’re so used to the Imperial measurement system in America, that we often overlook how ridiculous it is. 

Nearly the entire world uses the much simpler and more intuitive metric system based on ten. Ten millimeters make one centimeter, ten centimeters make a decimeter, and so on. 

But the Imperial system is an utter mess. 

Thankfully, Matt Parker of Head Squeeze breaks down and explains the entire crazy system based on a grain of barely from top to bottom.