Peter Millar Men's Size Chart

How to measure: body measurements in inches, over light clothing. Chest/Bust — around the fullest part, tape level. Waist — around the natural waistline. Hip — around the fullest part. Between sizes? Size up.

Size	Chest	Neck	Sleeve
S (38)	37–39	14.5–15	33–33.5
M (40)	40–42	15.5–16	34–35
L (42–44)	43–45	16.5–17	35.5–36
XL (46)	46–48	17.5–18	36.5–37
2XL (48)	49–51	18.5–19	37.5
3XL (50)	52–54	19.5–20	37.5

Polos, shirts and outerwear share one chart.

Source: Peter Millar size guide