How do you know which 'mask skirt' size to order? I see this in a lot of face mask-cameras. Is there a rule of thumb for SHORT, MEDIUM OR LARGE facemask skirts?
Ben T Medium size would be for most youths or small / petite adults. Large size would be for most size adults or anyone with a particularly wider face. Unfortunately there is no means of exact measurements and trying it on is the only true means of making sure it fits and feels comfortable.