Youth sizes mask. As we all know the face size of a child varies quite a lot and we have done our best to accommodate with this mask. The mask sits high on the nose and on smaller faces sits under the chin. On larger faces the top will still sit high on nose but lower portion will sit closer to jaw line. We have tested our sizing and found it sufficient for children age 5-13. We have included measurements in the photos. Masks are sold in groups of 10. If you would like to combine some adult and some youth please leave note in comments section with order and we will accommodate.