Sean Couture dress with illusion beaded bodice and corset back. Please measure carefully best to order two sizes. Get Your Tape Measure Ready! Learn the basics of measuring for the right fit, plus find size charts, measurements and conversions. TIPS: A. Bust: Measure around your body, under your arms and over the fullest part of your bust. Remember to keep the measuring tape comfortably loose. B. Waist Hold measuring tape at your natural waistline.