Accurately sizing a CPAP nasal mask is crucial for effective sleep apnea therapy. Start by understanding your mask type, then use manufacturer sizing guides or templates to measure your nose. Consider facial features like nose shape or facial hair, and test the fit at home for comfort and seal. Avoid common mistakes like overtightening straps, and maintain the mask with regular cleaning and part replacements. Consult suppliers like Tricare Medical in Tennessee for expert support and quality CPAP supplies. https://tricaredme.com/collections/nasal-masks