See - and I'm only 5'4" and most things are WAY too long on me because I have very short legs. That said, there are very few tights that are actually too long on me (pants, yes, stretchy things...not so much). This is because I have larger legs, so stretchy items expand to the side and therefore are rarely too long once on (even if the measured length is long). It's one of the few benefits to big legs!

I can't find short rain pants, but for tights, I just order my regular size. I've only had a problem once with a pair of Castelli tights that were too long.