Size: 22cm X 30cm, 28cm X 40cm. Specifications: 1) Made from high-quality and food contact safe materials (PA/PE). 2) With special design, when vacuuming the air comes out faster. 3) Can do printing on the bags, e.g. logo printing to increase your reputation on the market. 4) Works with most Clamp Style Sealers such as FoodSaver, Seal A Meal, Cabelas, Magic Vac, Lava, niho and many more. 5) Freezable, boilable (Sous Vide cooking assistant), microwaveable, and dishwasher safe. 6) EU/FDA/LFGB approved. 7) Custom sizes acceptable. Packing: Vacuum packing bags: 50pcs into a PE bag as a set.