Runs small. See Measurements:
Armpit to armpit 15
Length 22
Sleeves 17.5
No Material Tag - feels like a cotton or wool blend
There is a button hole on the collar but no corresponding button. Not sure if this is by design. Doesn't seem like it should button there? All other buttons are intact.
Great Condition

Classic vintage Ralph Lauren Polo blazer in rich navy blue. Features a double-breasted silhouette with six gold crest buttons, peaked lapels, and smooth satin lining. Tailored for a structured, elegant fit that flatters the waist. Three matching gold buttons accent each cuff. Perfect for timeless, preppy, or nautical-inspired looks.

Ralph Lauren, Polo, Vintage Blazer, Navy Blue Jacket, Gold Buttons, Double Breasted, Classic Style, Preppy Fashion, Women’s Size 10, Timeless Wardrobe, Structured Fit, Nautical Style