100% wool. No defects.

Single vent. 

Notice it tapers a lot from the arm pit to the waist.

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Measurements in inches; item laid flat:

Chest: (armpit to armpit) 23.5
Further down at the waist: 21.6

Shoulder seam to shoulder seam: 21

Length (bottom of collar to bottom): 34

Sleeve (shoulder seam to end of cuff): 24