Part of our mask sizing guide

Measure your CPAP mask size

Pick the mask you're sizing, then measure with your camera — takes about a minute. A shortcut alongside the printable templates in the full guide, not a replacement for them.

This is an estimate, for convenience only — a guide to help you narrow it down quickly, not a final determination. Nothing is uploaded or stored anywhere but your own browser; the measurement never leaves your device. The manufacturer's official printable template (or fitting in person at one of our stores) is still the preferred, most accurate way to size a mask — always double-check with that before you buy. If you're not sure, .