Blazer size equals chest circumference in inches, measured at the fullest point under the arms, so a 40-inch chest fits a size 40 (101 cm). Choose length by height: short for 5’3″–5’7″, regular for 5’8″–5’11”, long for 6’0″+, and size up if between sizes.
This guide has a men’s blazer size chart, a women’s blazer size chart, measuring steps, size conversions and fit checks.
Blazer Size Chart at a Glance
Numeric Size
Alpha Size
Chest (in)
Chest (cm)
36
S/M
36
91
38
M
38
96
40
L
40
101
42
L (some brands L/XL)
42
106
44
XL
44
111
46
XL/XXL
46
116
48
XXL
48
122
Men’s Blazer Size Chart
Men’s Blazer Chest and Waist Size Chart
The jacket size is your chest size rounded to the nearest even number.
Blazer Size
Body Chest (in)
Body Waist (in)
36
35
30
38
37
32
40
39
34
42
41
36
44
43
38
46
45
40
48
47
42
50
49
45
52
51
48
Men’s Blazer Sleeve and Length Chart
Sleeve length and centre back length change with each size. This chart uses ASOS’s formal jacket measurements.
Women’s blazers follow bust, waist and hip measurements. This chart shows body measurements by US size, based on SkillsUSA.
US Size
Bust (in)
Waist (in)
0
31
22
2
31.5
23
4
32.5
24.5
6
33.5
25.5
8
34.5
27.5
10
35.5
29
12
37
30.5
14
38.5
32
16
40
34
18
42
36
Women’s Blazer Sleeve and Length Chart
Sleeve length and coat length grow slowly as sizes rise. This chart uses A Cut Above Uniforms’ pilot blazer data, measured from the shoulder seam and the centre back neck.
I am the admin and author of SizesForm, researching, verifying, and explaining measurements, dimensions, weights, and sizes in simple terms to help readers understand everyday comparisons accurately and confidently.
