I made a 13-ounce/8 yard with an overall length of 25 inches. It's just about 3 pounds "on the hoof."

Just a wee bit was trimmed from each end, so it's very close to 4 yards worth of fabric. The left-over piece from the lengthwise split is about 7 inches x 4 yards. I don't think that i ever weighed that piece, hmmm; now I'm curious.

Even when a mill produces single-width cloth, we still refer to the weight as if it were double width. E.g. 16-ounce fabric might be 8 ounces per running yard. Often the weight is also specified in grams per square meter.