The size is suitable for adults and children from 16 years up and the self-fabric tie-backs enable the user to tie the mask to the desired size which is firm yet comfortable. Once tied, the mask can easily be removed without untying the tie-backs. Double layer sports polyester fabric. Each packed individually in a polybag.18.5 ( l ) x 12 ( w )  polyesterDue to health, safety, and hygiene protocols, we will not accept any returns on this product.