First, welcome from Oregons' beautiful Willamette Valley!

Your great kilt probably is made of double-width fabric. (Originally, they were made of two lengths of fabric sewn together--looms of the time could only make fabric 24-27 inches, approx. Modern looms can handle much wider fabric , so many types of fabric, including kilting wool, are available 54-60." So most great kilts are made of this uncut fabric.

A "modern" kilt of 4-10 yards is made either of a single-width fabric or a double-width that has been split. What goes around comes around, eh? The various lengths you mention and how well they work out for a particluar kilt are based on a variety of factors including such things as such as pleating method (box, double box, knife, etc) how wide and deep your pleats are, the sett size, fabric weight, your kiltmaker's skill, and how big around you are.

Whether you have enough fabric in your great kilt to go over your head is largely dependent on your height, where you wear the kilt, and the width of the fabric, not the length. You belt the plaid around you; the part above the belt is what you have to play with.

I hope this helps. This forum has a great search engine, also Matt Newsome's articles and the Scottish Tartans Museum's website have lots of info on the evolution and design of the kilt.

Moosedog