1. Having multiple closets.

"Hey cute top!" "Thanks, it's my sisters!"

2. Built-in protectors.

Who should you be more scared of? Me? Or my sisters?

3. Having someone to annoy 24/7.

*Casually strolls in while my sister is trying doing homework*

4. They will tell you the brutal truth.

It's always needed during the awkward phase when you want wear purple eyeliner, pink eye shadow, blue mascara and green lipstick with those fluffy slippers that you want to wear out in public.

5. They are your best friends from birth.

Want to go to the beach? Shopping? Don't want to go alone? Ask your sister!

6. They'll support you no matter what.

Even if they wouldn't make the same decision, they are willing to support yours (unless they think it's ridiculous, of course).

7. You can learn from their mistakes.

Even if they aren't older, you can still learn from their life experience, as well as share your own.

8. They will be there through it all.

From your first high school break-up until you're 80-years-old and sitting in the salon together getting your hair done, they will always be there for you.