Follow up from the post below (Leather Alpinestar Jacket fitness?)

R3Blue said:

the arm length seems a bit too long IMO. I am 5.6 155lbs. this is how it looks on me. I use 50eu or 40 us.
a 42 us could of fit me a bit more lose and relax. but the 40 was a bit better in the arms and not to lose on the bottom.
so maybe try smaller sizes


jackets should fit a bit tight in my opinion.

Click to expand...

The generally accepted rule on jacket sizing, for optimum safety/protection in a crash, is that a jacket should fit snugly but doesn't need to be tight. In other words, it should be "fitted". That's WITH the liner zipped in. If you want to be able to add base layers for changing weather conditions you'd want the jacket to fit a bit looser to start with.

Adjusters on the arms and waist should be able to bring the fit in. If they aren't able to, then the jacket is too large for you.

European gear nearly always runs one size small, since riders there tend to be leaner and also tend to like more tightly fitted gear. Just how it is. So, when buying European brand gear you almost always have to buy one size up (sometimes 2, or even 3 sizes up), unless you like a tight fit. British gear is the exception, as they use inch measurements like the U.S. for clothing (they use a schizoid combination of Metric/English/Imperial for measurements. Metrics for many things, English MPH and Miles for speed and distance, liters for petrol/gas but the Imperial Gallon (=1.2 U.S gallons) for other liquids, Pints for beer, etc. Totally Wack, eh?).

The American body type is larger/stouter than most Europeans. Blame genetics, diet, portion size, whatever. I blame the Internet.

So, a Euro 58/U.S 48 sized jacket is actually the same as a U.S. 46, which would normally fit an actual chest measurement of 43" or 44".