This is a regular-sized surgical mask for medical and welfare facilities. It's a pack of 10 masks, the minimum necessary, for single use. I use only Elleair products for everything: toilet paper, tissues, and masks, even though they're expensive. I guess I'm looking for peace of mind. Even if it's expensive, I always end up going for my usual Elleair! This is a trial pack of 10 masks, new and unopened, at a one-coin price, including shipping.