It’s important that your non-medical mask is fitted to your face, and comfortable enough to wear as long as you need!
Masks are measured from the tip of your nose to the tip of your chin. For instance, standard kids masks measure 2.5 inches, and fit most children aged 4-8!
It’s difficult to measure yourself, so if possible, please recruit someone to help you, or cut a piece of string or tape to measure, then check your measurement against a ruler.