Hey Granite, first off...Welcome to X-Marks. Traditional kilt length is much a matter of choice, within certain limits. Generally the accepted 'correct' length is from the top of the knee to about mid-knee. Personally I like mine to hit right at the top of my kneecap but I do have one or two that come to mid knee.

You may also find that by adjusting where you wear the waistband will make a difference in the length. I have one kilt with a traditional waist that I have to wear a little low to keep it at the right length so you might think about raising yours a bit.

Also to consider, is the kilt hemmed or selveged? If you have it hemmed, and there is no reason you can't, you lose the original look of the kilt. I don't think it will be very noticable but it is a thought.

Mike