The measurements should be taken directly on the body.

Chest circumference
The chest circumference is measured at the widest part of the chest (with a well-fitting bra).

Waist circumference
The waist circumference is measured at the narrowest part of the waist.

hip circumference
The hip circumference is measured at the widest point of the hip.

Size Chest circumference Waist circumference hip circumference
XXS <73 cm <58 cm <80 cm
XS 74-81 cm 59-64 cm 80-89 cm
S 82-89 cm 65-70 cm 90-97 cm
M 90-97 cm 71-76 cm 98-104 cm
L 98-107 cm 77-82 cm 105-112 cm
XL 108-119 cm 83-88 cm 113-122 cm
XXL 120-131 cm <89 cm 123-134 cm

If garments run smaller or larger, you will find a note about this in the product description.