The dress works best with a two-five cm allowance for movement.
A size 38 has the following approximate measurements: Chest/Bust 105 cm, waist 80-100 cm and hips 110 cm. The length from the shoulder is 90 cm.
For each size you go up or down, just add or subtract five cm.
Washing instructions: If you want to take good care of your dress, wash it gently by hand at 30 degrees in silk detergent and let it drip-dry.