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.
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About the measurements
We measured the relaxed inner seal and the gently stretched outer seal to give a realistic Min/Max window. Your goal is to sit comfortably inside that window, especially on width, so the mask seals without over-tightening the strap.
Remember to keep the measuring device straight without bending around the cxontour of your face.
Lens choice comes after fit
Pick your frame size first. Then choose lens power for your diving mask with prescription lenses using the lens calculator (find below):
Use Our Free Underwater Lens Calculator Tool
you vision changes underwater, we created a tool to help you find the best lens strength based on your vision.
Want to find your perfect fit?
Answer 5 questions and we will recommend you the best fit.
Let customers speak for us
What customers think about the store
Store specializes in prescription dive/snorkel masks with custom lens options. Fast shipping, responsive customer service, and excellent quality-to-price ratio. Customers praise accurate prescriptions, comfortable fit, leak-proof designs, and helpful support. ...