OK OK… Oversized sweatshirt nightgown in a more inclusive than usual “one size” sized sweatshirt. Fuzzy inside, well loved and shoulder spots shown on shoulder. I’m imagining the original owner having a baby Rhesus monkey who spilled it’s tiny milkshake because whomever owned this first totally had shoulder pets.
I mean look at those kittens they are having a great time.

Good condition, size 2XL (18 - 20) and XL (14 - 16).

Detailed measurements:

Bust - 25 inches
Waist - 25 inches
Shoulder - 24 inches
Body Length - 47 inches
Hem - 26 inches

This item is sold from an excellent, highly rated vintage boutique in Portland, Or.