I'm looking at buying some tartan directly from a mill to have a kilt made from in the future. The tartan is woven "double width" - My measurements are 48Wx50Hx26.5L...all in inches.

If I'm looking for an 8yard knife pleat kilt. Does this mean, bearing in mind my measurements above, that I would only need to order four metres of the stuff? Is the tartan cut down the middle and then sewn end to end?