Hoffmaster Earth Wise dinner napkin. 2 Ply, 1/8 Fold. Green Seal certified products and services have been tested according to science-based procedures, have been shown to work as well or better than others in their class, and have been evaluated without bias or conflict of interest. The Green Seal Certification Mark has come to stand for reliability, fairness, and integrity. Measures 17-inch length by 15-inch width.