I'm an average size woman (5'6") with a slightly big head and was surprised that the small is what fits (Enro's measurement chart made me think M). The small mask is comfortable, breathable and I haven't (fingers crossed!) gotten COVID yet, or sick at all this winter season. I do still wear N95s on crowded public transit and such, but this seems ok for going in and out of shops, the library, uncrowded laundromat, ordering inside at cafes... The large fit my large partner (6'3", also slightly big head, small goatee). The colors/design are as pictured.