My dress form is a sized small model. You can see how it fits (or how it is oversized) on a small frame.
Please check measurements carefully, vintage size tends to run smaller or it may have shrunk, thanks.
Measurements laying flat unstretched: Arm pit to arm pit 16.5 inches. Length center back not counting collar 24 inches.
Shoulder seam to shoulder seam 13 inches. Waist 13 inches. Length of Sleeves from top shoulder seam 23.5 inches. Arm opening 5 inches. Sleeve opening 2.5 inches.