How big (or small) is the iNAP? Olivier Lauzeral September 07, 2022 14:57 Updated The iNAP is the size of your smartphone and twice the thickness. Related articles How much does iNAP cost? I have difficulty sleeping with a foreign object in my mouth. What can I do? How does the iNAP work? How do I achieve negative pressure when using my iNAP? Where should my doctor send my iNAP prescription?