Back to the future, Marty McFly and Doc are part of the geek culture. Unfortunately we still do not have flying skates but you can always take this shirt with you.
Women's clothing size
With your arms relaxed at your sides, measure around the fullest part of your chest.
Measure around the narrowest part of your natural waist, generally around the belly button. To ensure a comfortable fit, keep one finger between the measuring tape and your body.