http://www.topendsports.com/testing/tests/hand-span.htm
purpose: The size of the hand is advantageous for some sports which involve catching, gripping or tackling.
equipment required: flat surface and ruler or tape measure
procedure: The hand is placed palm down on a flat surface. The fingers are outstretched as far as possible. Measure the linear distance between the outside of the thumb to the outside of the little finger.