Women's size chart - sizes 34 to 44:

For a good fit you need your body measurements.

Size 34 36 38 40 42 44
Body measurements (in cm)
A Chest circumference 82 85 88 92 96 100
B Waist circumference 66 69 72 76 80 84
C Hip circumference 91 94 97 100 104 108
D Arm length 59.5 59.5 60 60 60 60.5
E Upper arm circumference 26.5 27.5 28.5 29.5 30.5 32
General height basis: 168 cm.

To get the exact body measurements, it is easiest if you have some help from a friend. The measurements are taken directly on the body - in underwear only.