A 1930s puff sleeve knit top with a variegated knit pattern. It feels like a wool or possibly wool blend (the interwoven lighter/darker thread might have a different fabric content).
Size: xxs to small
Bust: 32" at rest; will stretch to 38", but best for around 36" max
Waist (unstretched to stretched): 22-35"
Length from mid-shoulder to hem (when not stretched): 14"
Shoulder: 15.5" (from where sleeve starts on each side to the other side)
Condition: Excellent