The Blue Angel is the ecolabel of the federal government of Germany since 1978. The Blue Angel sets high standards for environmentally friendly product design and has proven itself over the past 40 years as a reliable guide for a more sustainable consumption. Blue Angel Leitz ALPHA, A4, Brown, Cardboard, 250 g/m², DIN 821, 13.7" (348 mm) Leitz ALPHA. Format: A4, Product color: Brown, Material: Cardboard. Width: 13.7" (348 mm), Depth: 10.6" (268 mm), Weight: 5.29 oz (150 g). Sustainability certificates: Blue Angel