Measure your underbust circumferance tightly.
From the result deduct 5 cm and find the nearest size.
For example:
Your underbust measured tightly is 79.
79 - 5 = 74.
The nearest size is 75.

The underbust size is the first part of your bra size. Please, find it in the first column of the table below:

The overbust size/cup size.
Chose the bra, which you consider your best fitted one and put it on.
Tape measure yourself in the widest part of overbust circumferance.
This time do not measure tightly - the measuring tape should be pressed loosely.
Find the measurement in the line of column corresponding to your underbust circumferance.

For example:
Your overbust circumfearance is 101 cm.

In the first line/row of the table you will find the letter corresponding to your cup size. In our exaple it is a G-cup.

In case you hesitate between two sizes, we advise you to chose the bigger one.