If your lower eyelid to chin distance is on the borderline, pick a bigger size to ensure a better fit. You can always adjust the mask with the buckle on each strap.
- Kidsless than 9.2 cm / less than 3.6 inches
- S9.3 - 10.4 cm / 3.6 - 4.1 inches
- M10.5 - 11.5 cm / 4.1 - 4.5 inches
- Lover 11.6 cm / over 4.5 inches