Technical term used in printing and paper industries. Refers to the weight of paper per unit area, typically expressed in grams per square meter (g/m²).
The grammage of this paper is 70 g/m².
The higher the paper weight, the thicker the paper.
Compound of 坪 (tsubo, a unit of area) and 量 (ryō, quantity/weight). The term is a technical coinage for paper weight measurement.