The proper length of the jacket is at or above the bottom of the fell. I prefer my kilt jackets a little shorter than the bottom of the fell. If you kilt does not have the pleats sewn down, measure your kilt lenth and divide it by 3. Since you like to wear your kilt about 1 or 2 inches below the traditional kilt, add an in to the 1/3 measurement. This should put the jacket about the shelf of your butt.