Disclaimer: these re-usable face masks are not medical devices or classified as personal protective equipment (PPE). To reduce the risk of infection, please use your face mask in conjunction with sensible pre-cautions, such as: physical distancing, good respiratory etiquette, hand hygiene and avoiding touching your face, nose, eyes and mouth until you have sanitized your hands.
9.5 - 11.4
Instructions: use a ruler to measure the vertical distance between the bridge of
your nose/lower eyelid and the bottom of your chin. This is easiest to do in front
of a mirror or with the help of a friend.