Oh brother of mine here is some info I found while sitting bored at work. It's from the SWK website, I thought I'd post it here since others might have the same question. And, oh yeah, did I mention I was bored? I should have.....

Length* on all Standard, Economy & Heavyweight kilts is 24". Our kilts are usually worn traditional-style, higher on the waist (about an inch above the navel, usually), not low on the hips. Some length adjustment is obtained by wearing the kilt higher or lower on the waist. These kilts are easily hemmed to any desired length, and hemming is essentially undetectable if done correctly (with a machine-sewn blind hem stitch). Only on the heaviest weights of kilt fabric does a hem become visible because of the thickness, and on lighter-weight kilts a hem can add weight to the bottom edge, making the fabric hang even better, behaving like a heavier-weight fabric. We strongly advise against cutting a kilt to shorten it. We do not offer hemming service at this time, this is best done by any local tailor/seamstress.