These non-medical grade ADULT sized masks are very comfortable to wear. One size fits most. *Adult size fits most (approx. 7.25" x 5.25") *Comfortable T-shirt material (2-ply polyester) *Ear strings are stretchable, soft, and comfortable to wear over many hours *Whimsical designs by Liane Fried *Machine and hand washable PRICE IS FOR ONE MASK.