Can be adjusted to head size. Thanks to the drawstring design.
After washing your mask with clean sanitised hands.
Pull the top loop through, enough to go over your head, then in front of the ears.
Take the mask to get it to sit security over upper cheek, nose and mouth.
Take under chin/neck and tie behind head.
Make sure moving your head forward and back that it is sitting securely and comfortably. If not, adjust tie.