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The Neptune III is available in two sizes, Small/Medium and Medium/Large.
It is essential to choose a suitable size. You can choose between size S/M (for adults with smaller faces,
women and children over 12 years old) and size M/L (for an adult male, or larger faces).
Measure the distance between the bridge at the top of your nose and the bottom of your chin.
•
Choose size S/M if it is BETWEEN (3,9") 10 cm and (4.5") 11.5 cm.
•
Choose size M/L if it is MORE than (4.5") 11.5 cm.
There are two different size categories on the chart: Small/Medium and Medium/Large. If the measurements
fall within the both ranges, then the diver should technically be able to wear either full face mask (M/L or
S/M), and in that case should try on a mask to select the best fit.
TRY YOUR MASK: Don and doff the mask following the instructions in paragraph 9.2 - once the
mask is tight on your face, if there is NO SPACE between your chin and the silicone skirt of the
mask, you've got the right size.
7 - FIND YOUR MASK (IDM) SIZE
The illustration of the mask measuring chart is not to scale
NEPTUNE III Package Owner's Manual rel. 2.1
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