Lipometry is the measurement of the thickness or width of someone's lips. While it may seem like a straightforward term, there are actually various synonyms that can be used to describe this practice. Lip measurement, oral commissure assessment, and perioral thickness measurement are all potential phrases that can be used instead of lipometry. This terminology is commonly used in the fields of cosmetic surgery, dentistry and even speech pathology, where measuring lip movement can help to identify speech difficulties. Despite the different phrases, the goal of lipometry is always the same: to precisely measure and assess the lips for a variety of purposes.