I am the second owner, it is a classic old school and cute set.
There is no measurement information that I can find in the library, but I reckon the jacket is suitable for size M/L in general. There is shirring on the back allows adjustment.
Following is my measurement for the jacket:
Shoulder: 38cm
Waist: 84cm
Measurement for the skirt according to lolibrary:
Length

45 cm

Waist

66-78 cm