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ResMed Airfit F20

How to determine the right size for an AirFit F20 mask:


Option 1: Measure your face using a ruler                     or tape measure   *recommended method*


To determine the correct mask size for your facial structure, we recommend taking exact measurements using the method described below. This is the most accurate way to determine your correct size.

  1. Find a ruler or measuring tape at home. When measuring, please try to use a rigid measuring tool and measure in a straight line up and down.

  2. Measure from the bridge of your nose to the indent on your chin (just below your bottom lip). It may be helpful to have a friend assist you. *See fig. 1 below. You should be measuring from the height of the bridge of your nose (which his usually just below your eye line) down to the indent in your chin.

  3. Match your measurement with the given sizes below to find the correct sizing for you.


Option 2)  Measure your face using a printed sizing template

If you don’t have a ruler or tape measure, we’ve created a printable sizing template you can use at home. Here’s how to use the printable sizing template:

  1. Access the 'Airfit F20 Fitting Template' PDF

  2. Open the file. Print the file at home. It doesn’t need to be in color – black and white is fine.

  3. After printing the template, get a pair of scissors and cut out along the dotted line. Once cut, the template should look like the one below. *See fig. 2 below.

  4. Align the arrow on the sizing guide to the bridge of your nose. *See fig. 2 below.

  5. Select the most appropriate size by referring to the area of the guide just below your bottom lip, in the indent on your chin.

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