Our model is 178cm and wears a size 38/40.
Size 34/36: Length front: 108cm, length back: 118cm, waist: 56cm, sleeve length: 60cm.
Size 38/40: Length front: 108cm, length back: 118cm, waist: 60cm, sleeve length: 61cm.
This dress has a larger fit, but can be made to size with the drawstring waist. So size 34/36 can fit both XS/S and 38/40 can fit both M/L