Scuba diving masks can be tricky to fit, especially without being in the water. The link below goes to an article that shows you how to fit a scuba mask properly, without being in the water...
How to Determine If a Scuba Mask Fits -- Without Getting Wet
http://scuba.about.comTue, 30 Jul 2013 14:09:14 GMT
All scuba diving masks are not created equal. They are designed to fit different face shapes and sizes, so it is essential to try on masks before purchase. Here is a step-by-step guide for determining whether or not a scuba ...