Hahnemuhle Harmony watercolor paper comes in 2 sizes 20" x 26" and 28" x 40" both with the weight of 300 gsm (140 lbs). Harmony watercolor is a natural white paper for all wet painting techniques and has surface sizing. This paper is acid free, light resistant and due to the surface sizing Harmony is eraser resistant. You can use this paper for watercolor and wet-painting technique. Harmony watercolor comes in cold-pressed, hot-pressed and rough. This paper is amazing to work with and allows for masking tape or masking fluid to be used and remove residue free. Also, wet colors can be easily corrected or taken off.