The Ultra Jacket has a relaxed fit. Measure around the fullest part of your chest and hips and the narrowest part of your waist. Consider the layers you expect to wear underneath the jacket when choosing your size.
XS: Chest 32–34in · Waist 25–28in · Hip 34–37in · Arm 30in
Small: Chest 34–36in · Waist 28–30in · Hip 37–39in · Arm 31in
Medium: Chest 36–38in · Waist 30–31in · Hip 39–41in · Arm 31in
Large: Chest 38–40in · Waist 31–34in · Hip 41–43in · Arm 32in
XL: Chest 40–43in · Waist 34–37in · Hip 43–46in · Arm 33in