This is a set of two polyethylene garbage bags with a bottom gusset. Each bag is approximately 25 x 20 cm and contains 15 sheets, for a total of 30 sheets. One bag is unopened, and the other was opened with the intention of using it, but it was different from what I expected, so I put it back in the bag. Please understand. It will be shipped in a simple envelope. Shipping may take a few days depending on the timing, so please be patient. To prevent any trouble, please ask any questions if you have any concerns.