Clothing size is determined by the girth your chest. For selecting dress consider waist size, whereas for trousers use hips girth.
In the table, you see the maximum values for girth under which clothes will be tight on you. If your figuers are higher than indicated in the table, it is recommended to choose bigger size.
To select the right size for top or dresses look at breast size. Consider waist size when choosing the size of trousers.
Please note that the measurements need to be taken over a comfortable underwear. While taking measurements you should stand straight, without tension and don not change your posture. If one part of the body correspond to one size and the other to a different one, then we recommend you to choose a larger size.