* Vos lèvres: This is the most formal and polite way to say "your lips" and is used when addressing someone you don't know well or when you want to be particularly respectful.
* Tes lèvres: This is a more informal way to say "your lips" and is used when addressing someone you know well, like a friend or family member.
* Ses lèvres: This refers to "his/her lips" and is used when talking about someone else.
For example:
* Vos lèvres sont très belles. (Your lips are very beautiful.)
* Tes lèvres sont douces. (Your lips are soft.)
* Ses lèvres sont rouges. (His/her lips are red.)
Remember, the specific choice of wording will depend on the context and the relationship you have with the person you're speaking to.