SIZE CONVERSION MADE EASY: Did you know Fantasie is sold in UK sizing? Please use the size chart to convert your US to UK size. To find your size, measure around the torso underneath the breast tissue to determine your band size. If measurement is an odd number, round up to the following even number. Measure around the fullest part of the bust to determine your bust size. To determine your cup size, subtract your band size from your bust size. Molded cups provide a completely smooth and seamless look. Smooth, seam-free finish under clothing. Fixed fully adjustable shoulder straps.