These masks work fine. No one has gotten sick. They fit my 15 & 13 year olds well. They have slender faces. They are small on me, average-sized adult. They are large on my 8-year-old.

Adult masks too large and child size is too small. These are perfect for a small adult or narrow faces.

Happylife Goodday KF94 Youth(Black)-KoreanPackaging

We purchase the adult ones and the child ones. They are so breathable, comfortable, and fit really secure. So far they have kept us all from getting sick even after multiple exposures so I feel they work well.

Excellent fit for our 9 y boy.