BUTTERFLY Protective Mask is One size. Custom made. Easy to use. Reusable (Wash with proper sanitization after each use). Comfortable 100% polyester fabric (Decorated front material is a poly sheeting, and the back is made from poly microfiber). Sturdy over-the-ear elastic straps for a snug fit. One size fits all (7" x 3.5") to cover your nose and mouth. Custom made in the USA. Please allow 7-10 days for delivery. More matching BUTTERFLY items in the Vida Collection. See MENU at store.