Ladies, The measurements I see posted are sometimes a bit comical. I thought all girls knew how to take their measurements at least from the age of 12 (my 11 yo niece is almost straight as a board, and she knows - though why yet is beyond me).
Soooooo... in the interest of education and to further transparency in advertising, here is how it's done. Your vital statistics (measurements) are methods 1, 3, and 4.
http://www.wikihow.com/Take-Measurements-(For-Women)