You can print your ResMed sizing guide here. Remember to print to scale, as you’ll have to cut out your guide from the document you print.
Once you have your sizing guide:
- Use a mirror and hold the sizing guide to your face.
- Try fitting your nose into each sizing option. The most comfortable one will provide you with the best fit.
As an alternative to using a sizing guide, you can also measure your nose width with a ruler. Different measurements correspond to the following sizes:
- Between 23-37 mm: Small
- Between 30-45 mm: Medium
- Between 45-55 mm: Large
Before purchasing or trialing the AirFit N20 nasal mask, your CPAP provider will follow the same process using the sizing guide to help select the mask size that best fits you.