To determine the correct lingerie size, two circumference sizes are needed: the circumference under the bust and the circumference over the bust. The correct lingerie size can then be determined using the table.
Step 1: measure the circumference under the bust (lower bust width) and determine the circumference size
Step 2: measure the circumference over the bust (upper width) and determine the cup size
Cup size is too large
First check whether the torselet on the back is pulled down properly so that the cups on the front fit nicely. The cup must enclose the (bottom of the) bust appropriately. If there are creases in the cups or if the breasts fall too deep into the cups, the cup is too large. Then use push-up cups or a smaller cup size with the same sub-bust width.
Cup size is too small
If the brackets are too far from the body or press too much under the arms, the cups are too small: use a larger cup size with the same sub-bust width.
Cup size is good, circumference size is not
In this case, use a different circumference size but also a different cup. If the circumference becomes larger / smaller, the cup also becomes larger / smaller! Example: With 85C the cup is good but the circumference is too small. Then take an 90B (and not an 90C). After all, an 90B has the same cup as an 85C, only the circumference is larger.