How would you like to find your mask fit?
Choose automatic camera measuring or follow the manual ruler guide below
A Eye Width
Measure from the outer corner of one eye to the outer corner of the other in a straight line. Use a ruler, soft tape, or even a phone charger cable (then measure the cable against a ruler). Keep it flat against your face.
B Mask Height
Measure from just above your eyebrow line straight down to just below your nose. Use a ruler, soft tape, or phone charger cable. This is the vertical space where the mask and silicone skirt will sit.
C Head Circumference
Wrap a soft tape, string, or phone charger cable around your head above your ears and eyebrows, like measuring for a hat. Then measure the length against a ruler. This tells us how the strap and silicone skirt will seal around your face.
D Nose Size
Some masks have a narrower nose pocket. Selecting your nose size helps us rule out masks that may dig in or feel uncomfortable. If you're unsure, Medium is a safe choice.
✓Your Mask Recommendations
Enter your measurements and we will find the best masks for you.
Rx Lens Strength + Face Fit
Find Your Prescription Mask Quiz
Built specifically for prescription snorkel and dive masks, this quiz helps match your lens strength, face fit, and intended use in one simple flow.
Answer up to 6 quick questions in about 2 minutes.
Start the quiz →Have your prescription nearby if you know your numbers. If not, no problem, we can still guide you.
Your prescription image is only used to read your values. It is never stored.
Your Free Snorkeling Learning Hub
Your Free Snorkeling Learning Hub
At Oceans Optics, we believe the right gear is only part of the experience. Knowing how to use it, what to look out for, and how to feel confident in the water matters just as much.
Free to explore. Easy to follow. Built to help you snorkel with more confidence.