BTW, "canvas" is just a term for any "simple cloth" of heavy weight. A simple cloth is a fabric woven with one to one yarns of the same type (wet or dry spun etc.) for warp and weft. Not not a weave such as diagonal twill, which would obviously have uneven responses to temperature and humidity, despite its popularity in the 19th century. Going backwards in time "canvas" would be made of cotton, linen and hemp before that. Most all famous images on cloth are painted on hemp, not linen or cotton. Anyone suggest getting dimensions from the Kamuda's jacket?