Here is Butterick Pattern # 6890 UNCUT Misses Lounging Top, Pants or Shorts, Robe with Belt in sizes 16, 18 and 20.
ROBE: Very loose-fitting, A-line, below mid-knee, collar, dropped shoulders, carries, long sleeves, & self-belt. VIEW A: Contrast collar & cuffs.
PAJAMA TOP: VIEW C: Very loose-fitting, A-line, collar, dropped shoulders, long sleeves, pocket, & purchased trim. VIEW D: Pullover, sleeveless.
PAJAMA PANTS or SHORTS: Very loose-fitting, straight-legged shorts or pants, elastic waist & attached ties.
Bust from 38 inches to 42 inches
Waist from 31 inches to 35 inches
Hips from 40 inches to 44 inches
Fabrics: Silk like Jacquard, Charmeuse, Crepe De Chine, Batiste.
The pattern and instructions are still factory folded. The envelope shows some wear and creases from storage.