Feature●Size: Width 12.2 inches (310 mm) x Top 8.9 inches (225 mm) + Flap 2.0 inches (50 mm) Mouth Glue: Vellotte (with self sealing), Window: Pear Contents: A4●Packaging material with paper bubble inside envelope. It is made of paper, but has the same cushioning as bubble wrap●By switching from the use of bubble foam, you can promote de-plastics It is a smart registered plastics endorsed by the Ministry of Environment. The paper used is a forest-certified paper●Uses forest certification paperDescription