The Belted Tartan, or feilidh-mhor is the historical antecedant of the modern kilt, and was popularly worn in the Highlands from about 1600-1800, although it was probably worn before and after those dates - nobody knows for sure. The feilidh-mhor is made from a piece tartan about five feet wide and twelve feet long. Before modern looms it was constructed from two pieces, 28 inches wide by four yards long, sewn together lengthwise. It is first pleated in the middle over a belt (upper left), then wrapped around the waist with the remainder brought up and pinned at the left shoulder as shown (lower left), leaving the sword arm free. The last two pictures show it pulled up around the neck as a rain cloak. This form of Highland dress dates back to the 16th century, and is often incorrectly interpreted by re-enactors today.
Below is a great link for more info on Kilts and Tartans http://www.tartansauthority.com/highland-dress/ancient/the-belted-plaid-2/