it depends on your build and heights.
if you can get a fitting suits from counter, then by all means do. but make sure you select style that fits you properly (check the shoulder width, waist line and sleeves).

otherwise get it tailored. also, if you are tall 175cm above consider having a 3 button suit rather than a normal 2 button suit. anyway, best read up on suits before you get one if you are not familiar with them ^^