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A space mile is a unit of distance that is approximately the length that spans one minute of arc on the circumference of the observable universe, using any meridian.

Using the results found by Cornish et. al in the paper titled "Constraints on the Topology of the Universe: Extension to General Geometries" the length of a space mile is currently defined as being 13526301.703 ly or about 4147183 parsecs.
Man 1: "How long is a space mile?"
Man 2: "It is 13,526,301.703 light years long, or about as long as my space DICK!"
All: "OOOOH!"
by verisimilidude. December 28, 2015
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