The super-dense EnviroCloth cleans mechanically, picking up the smallest particles on its own, so you won’t need any harmful chemicals. It removes dirt, grime and up to 99% of bacteria from surfaces with water alone and then the BacLock® agent goes to work within the cloth to self-purify it within 24 hours. Use wet or dry. Size: 35 cm x 35 cm / 13.78" x 13.78" Item is new but discontinued from Norwex. Please let me know if you'd like to bundle Norwex products together to save on shipping.