Eric, Welcome to XMarks and the addiction.

I'm not the best resource but, that would depend on the tartan you are using. The size of the sett will determine how deep your pleats are. Other factors will include the reveal, it you are pleating to sett or to stripe. The best resource would be a book by one of our members, Barb T. It is a very good kilt making resourse.

Good luck and enjoy wearing your kilt(s)