Ralph Lauren - Jacket - New with tags

For the Polo Ralph Lauren Harrington-style jacket shown (such as the Bedford Twill or Bi-Swing models), the shoulder width for a standard size Medium is approximately 20 inches (50.8–51 cm).
Rustan's
Rustan's
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Shoulder measurements for these specific models typically range as follows:
Small: ~19.3 inches (49 cm)
Medium: ~20 – 20.1 inches (50.8 – 51 cm)
Large: ~20.9 inches (53 cm)
Extra Large (XL): ~21.7 inches (55 cm)
Rustan's
Rustan's
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Fit Considerations
Bi-Swing Construction: Many of these jackets feature a "bi-swing" back, which includes extra folds of fabric at the shoulders. This design is intended to provide a greater range of motion and can make the shoulders feel more accommodating than a standard fixed-seam jacket.
Regular Fit: These jackets are generally cut in a Regular Fit, meaning they are designed to have extra room in the chest and shoulders for layering over sweaters or shirts.
Farfetch
Farfetch
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To get an exact measurement for your specific jacket, it is best to lay it flat and measure straight across the back from the point where one shoulder seam meets the sleeve to the same point on the opposite
Pit-to-Pit Measurements by Size
Size Estimated Pit-to-Pit (Flat) Body Chest "To Fit"
Small ~20 – 21 inches (51 – 53 cm) 35" – 37"
Medium ~22 – 24 inches (56 – 61 cm) 38" – 40"
Large ~24 – 25 inches (61 – 63.5 cm) 42" – 45"
XL ~26 – 28 inches (66 – 71 cm) 46" – 48"