Asian size usually 1-2 smaller than other size
please check size chart carefully before buying

I am 171CM and 74KG
L size fit great

Size Shoulder Chest Length Sleeve Waist
M 43.8cm 98cm 68.5cm 62cm 88
L 45cm 102cm 70cm 63cm 92
XL 46.2cm 106cm 71.5cm 64cm 96
2XL 47.4cm 110cm 73cm 65cm 100
3XL 48.6cm 114cm 73cm 65cm 104
4XL 49.6cm 120cm 73cm 65cm 108

Item Type: Blazer
Material: Polyester
Closure Type: Single Breasted
Clothing Length: Regular
Color:As Pictures
Size: M,L,XL,2XL,3XL,4XL,5XL

There is 2-3% difference according to manual measurement.
please check the measurement chart carefully before you buy the item.
1 inch = 2.54 cm