Artist's Canvas by the roll

The following are Fredrix American Artist Canvases hence the feet and inches.
KNICKERBOCKER CANVAS 9oz primed  weight
A smooth, lightweight cotton with fine texture perfect for detail work.  60 inch by 6 yards roll. 
DALLAS CANVAS 12oz  primed  weight
This is a medium weight 100% cotton duck with medium texture.  63 inch by 6 yard roll
UNIVERSAL CANVAS 10.5 oz primed weight
A popular medium weight cotton duck with an even texture.  61 inch x 6 yards roll.
Fredrix Raw Cotton (unprimed cotton artist canvas)
Sold by the piece - 54 inch x 6 yard roll (1.37m x 5.5m).  Fredrix Raw Cotton Unprimed cotton artist canvas, Unprimed Weight 12oz.   ​A heavy duck canvas with a very close construction