At EnerPlex, we understand that a face mask is not a “one size fits most” - We also know that if you wear a mask it should be comfortable, fit properly, and provide proper protection which is why we came up with our High End 3-Ply Safety Masks in 3 sizes. We developed a sizing chart for Youth, Medium/Large, & Extra Large. Should you have any issue with size please contact us immediately and we will help out with sizing. This Size Will Fits Most Adults, Please See Size Chart in Image Section - Key Features: EnerPlex Face Masks are a Three-Layer Design – Outer layer DWR 100% Polyester, Middle Layer Cotton Blend, Inner Layer NanoFine Cotton Blend – soft against the skin. Designed with high quality light weight fabric for maximum comfort. Our stretch ear loops allow for a snug and secure fit. Ideal for everyday use – Indoor/Outdoor, great for essential workers, can be utilized while traveling, running errands, attending grooming appointments, etc. Care: wash before first use. Machine wash cold. Do not bleach. Do not dry clean. Tumble dry low or lay flat to dry to avoid shrinkage. No fabric softener With our EnerPlex Face Masks customer service, quality, and safety is our number one priority.