Also see definition of "Span" in Word Study
SPAN [isbe]
SPAN - (zereth; spithame): A measure of length equal to half a cubit or about 9 in. (Ex 28:16; 39:9; 1 Sam 17:4, etc.). Lam 2:20 the King James Version is a mistranslation; see the Revised Version (British and American).See WEIGHTS AND MEASURES.
Also see definition of "Span" in Word Study