The Model is 6', chest 39cm and wears a Medium Size.

Your Chest size should give you the right fit. 

REGULAR FIT

The chest, waist, and arms are relaxed in this fit. 

CHEST MEASURE (INCHES)	SIZES	LENGTH (INCHES)
38	S	26
39-40	M	27
41-42	L	28
43-44	XL	29
45-46	2XL	30
47-48	3XL	31

 

SLIM FIT

For all the product titles that mention 'Slim Fit' please refer to the following sizes. 

CHEST MEASURE (INCHES)	SIZES	LENGTH (INCHES)
36	S	26
38	M	27
40	L	28
42	XL	29
44	2XL	30
46	3XL	31