The old ones I have seen and handles. the widest I have seen is 6 inches.
A lot of the sashes you see for sale (old ones) at auctions are from the 19th century. Not a lots from earlier times.
I have a large 19th century sash.
It is fingerwoven, is 6 inches wide and about 140 inches long. it wraps around me twice. It is in all natural colors of wool- meaning the color it was on the sheep is the color the wool yarn is. Another thing is that sashes where not just an indian made item. They were trades as a finished item like shirts, ribbonworked clouts and leggings.
The town of L' Assumption, Canada was the birth place of the assumption sash. As well, all sash were not woven. But a strip of wool cloth or other fabric. just a my 2 cents.....
raymond