The labia protect the vaginal opening. Every woman has 2 outer labia and 2 inner labia.
See for yourself
Labia look different in each woman. Some women have large labia; others have smaller ones. Hair (called pubic hair) grows on the outer labia. The inner labia are between the outer labia. They are a slightly darker colour.
Small or large?
In the past, the outer labia were called the large labia. The inner labia were called the small labia. But those names caused confusion. The inner labia are actually larger than the outer labia. That’s why we now say: inner and outer labia.