stormtroopers are not cloned from one JANGO host.. and they are actually humans!!!Humans come in all sizes.
Anywae, back 2 topic...When i referred to 1.78m stormtroopers, i meant those luke encountered on the first death star...I mean, luke is only 1.72m, and even drew Leia to comment he was a little "short for a stormtrooper"... So even though stormtroopers r cloned from different hosts, i think its pretty impossible 2 note all their different heights...So when people think of stormtroopers, they generally think 1.78m ones...