Quantity and size: Contains 40 rolls, 15 pieces per roll, total 600 dog waste bags. Each dog waste bag measures 23 x 30 cm, which is large enough and perfect for all dogs and cats. It can also be used to clean cat litter, dirty baby diapers, food leftovers or waste disposal, etc. Robust and durable: dog waste bags are made of durable material, are odourless and non-toxic, not easy to break or tear, ensuring the hygiene of your hands and keeping the environment clean. Leak-proof and odour-proof: these waste bags for dogs are waterproof and leak-proof, which effectively seals odours and protects your hands from dog waste. They are always useful when you need to run a piece to find a garbage container. Portable and easy to use: One roll takes up very little space, you can easily put the dog waste bag in your bag and go for a walk without any problems. When in use, they are easy to open and easily detached from the roll. Sufficient for 300 days: A total of 600 waste bags for dogs are included, 1-2 are used daily, which is enough for 300 days of use, so you don't have to worry about constantly buying new bags.