CPAP Expert Toll-Free Customer Support

Search Site

CPAP Mask Fit Guide

General Sizing Guidelines: 

NASAL MASKS: Measure your actual nose size from top to bottom and side to side.

Petite: 1.5" tall, 1.5" wide
Small: 1.75" tall, 1.5" wide
Medium-Small: 2" tall, 1.5" wide
Medium Wide: 1.75" tall, 2" wide
Medium: 2" tall, 1.75" wide
Large: 2.25" tall, 2" wide
Standard: 1.75" to 2" tall, 1.75" wide 

FULL FACE MASKS: Measure straight down from the middle of your pupil to just below the lower lip. It may help to imagine a horizontal line extended from your lower lip to beneath your eye, so that you can measure straight down from your pupil.  Measure the width of your mouth in a natural position. (i.e. not smiling). Make sure top fits at bridge of nose, and bottom covers mouth completely.

Small: 3.25" tall, 2.75" wide
Medium: 3.5" tall, 3.25" wide
Large: 4.25" tall, 3.25" wide

(NOTE: individual mask styles may vary, these sizes are a guideline) 


About CPAP Mask Sizes:

During that critical time in CPAP therapy when you are becoming accustomed to improved breathing while you sleep with a CPAP machine, one of the most important things to get right is the fit with your mask.  It could make the difference between continuing treatment and suffering through sleep apnea.  The fact is, there are several types of masks for several different types of breathers and everyone takes to treatment differently.  Read on for a few tips to help get that ever-important mask fitting right.

To start, remember your options.  There are varied mask types and the best way to find the right one is to literally try them on.  The full face mask covers your mouth and nose.  This type of mask is good for those who tend to breathe through the nose or mouth.  The nasal mask covers just the nose and though it is smaller and a little less invasive, a chinstrap may be necessary with this mask.  The nasal pillows sit just below the nostrils and are the least invasive mask.

Once you have chosen the type of mask you want to use, the most important next step is to eliminate any mask leaks.  These leaks occur when air that is being supplied from the CPAP machine is able to escape from the mask.  If this is the case, there is no way to benefit from treatment because the machine cannot properly supply you with air at the right pressure for you. 

In order to avoid leaks, make sure you apply your chosen CPAP mask before you turn on the machine.  This will prevent the mask and tubing from becoming misshapen and creating the leak you are trying to avoid.  As well, it is fine to use a mirror to apply your mask until you know how it feels when it is worn correctly.  Because each mask is made to fit a certain way, make sure to follow the manufacturer’s guidelines when applying your CPAP mask.  The sequence they provide is important.  Finally, when properly fitting your CPAP mask, remember, it does not always fit the first time, or on the first try.  This is why we have a 30-Day Mask Guarantee policy that gives you the peace-of-mind to have 30 days to try your mask out and return to us for a replacement at no expense to you. 

If this is your first CPAP mask, we suggest purchasing a mask that includes multiple sizes. These are often called Fit Packs and include all the mask sizes in one package so you can try and fit yourself to the appropriate size and know which parts to order when it's time for replacements. 

Back to top