Vulva
We want to state this out loud: vulva and vagina are not the same thing. To be precise, the vagina is part of the inner female sexual organs, but it's not the whole. We invite you to start saying the world vulva every time you refer to your external sexual organs, also because, most of the fun is there! Before describing what's the vulva, it's important to clarify that all women are made of the same bits, just uniquely arranged. There is no perfect vulva or vagina. We all have different looking one and that's ok and normal. If you have never properly seen your vulva, it's time to take a mirror and have a look. The first thing you see, right after the belly, is the area of the mound of Venus. A fatty cushion usually covered by pubic hairs after puberty. There are more prominent ones and also flatter variants, both are normal. Going down between your legs, you'll first see the outer labia (labia majora), thicker than the inner ones, useful to protect the all area, covered by usual skin (so we normally finds hairs on them). As mentions, not all vulvas are the same. Some women have thinner outer labia, other have inner labia that come out the external ones. Both are normal. The inner labia, are lined with mucouse membrane, thinner than the outer ones. Full of crinkles or fold, are very sensitive (not as the clitoris) and can fit inside the outer labia or spread outside them. They have no hairs, since are made by mucouse membrane. If you spread your labia, the inner part is called vestibulum. It's the area where you find the urethra (right below the head of the clitoris) and the vaginal opening. The clitoris is located up where the labia meet.
Read more about your vulva here.