Mask Measuring Kit assists divers in determining the mask size that fits best. The Neptune Series Masks come in two sizes: small/medium and medium/large.

• Sizing and measuring system were designed in accordance with the official measuring procedure used in the Los Alamos Scientific Laboratory charts at the SBCCOM Mask Fit Facility- Aberdeen Proving Ground ( Maryland, USA)
• Mask Measuring Kit includes:
• Measuring tool (caliper)
• Full Face Mask size recommendation chart
• Measuring Instructions
• Only two simple facial measurements determine mask size