New old stock Sears mechanic button down from the 50s!!!
Pit to pit: 44 inches
Shoulder seam to shoulder seam: 19 inches
Shoulder seam at arm pit to edge of sleeve cuff: 5. 5 inches
Middle of shoulder to bottom hem:
Tag says: medium
Estimated modern size: medium
All measurements are taken with the garment lying flat and are doubled where applicable. To find out if it will fit you, take a similar garment from your own wardrobe that fits you well and compare measurements.