Caution. These are the actual jacket outer shell manufacturing measurement specifications, not your body measurements.
A -Sleeve length (From collar seam to end of sleeve including the shoulder and cuff).
B -Shoulder width (The length between the two shoulder seams)
C -From the collar seam to bottom of waistband
D -Waist size (Jacket Waistband circumference)
E -Chest size (Jacket Chest outside Circumference*)

All measurements are in inches. 1 inch = 2.54 cms.

*Jacket Measurements are a quideline*. Normally, we don't reccommend upsizing as jackets are full cut. All measurements in inches.
Caution especially for youth sizes: quilted lining in small jackets can make both the body and sleeves feel tighter.
                 
  ADULT
MEN'S MEASUREMENTS		              
INCHES   S M L XL 2XL XXX 4XL
SLEEVE A 35 35.75 36.5 37.25 38 38.5 40
SHOULDER B 24.5 25 25.5 26 26.5 27 28
BACK C 27 27.5 28 28.5 29 29.5 30
WAIST D 30 32 34 36 38 39 40
CHEST CIR' E 50* 52* 54* 56* 58* 60* 62*
CUFF   3.25 3.5 3.75 4 4.25 4.25 4.25
                 
  LADIES MEASUREMENTS
              
INCHES   S M L XL 2XL XXX 4XL
SLEEVE A 33.5 34.25 35 35.75 36.5 37.5 38
SHOULDER B 23.5 24 24.5 25 25.5 26.5 26
BACK C 26 26.5 27 27.5 28 28.5 29
WAIST D 26 28 30 32 34 35 36
CHEST E 46* 48* 50* 52* 54*
56*
 58*
CUFF F 3 3 3.25 3.5 3.75 3.75 3.75
                 
                 
  YOUTH              
YOUTH AGE  
2-4
6-8
10-11
12-13
14-15
16-17
18
SLEEVE A 25.5 26.75 28 29.25 30.5 31.75 33
SHOULDER B 19.5 20 20.5 21 21.5 22 22.5
BACK LENGTH C 19 20 21 22 23 24 25
WAIST D 20 21.5 23 24.5 26 28 30
CHEST E 32 34 36 38 40 42 44
CUFF F 2 1/4 2 3/8 2.5 2 5/8 2 3/4 2 7/8 3
                 

*NOTE*
*Jackets may vary in finished size from one (1) inch in smaller sizes to +/-2 inches in sizes XX up.
This is due to pattern sew.
Jackets are full cut and custom made not custom fitted. 

We use the same sizing templates as many other USA suppliers.