They are sized by chest size. Measure his chest in inches under his arms or look at one of his suits, and get that size. I have a 48″ chest, so I wear a US 48 (same as Euro 58).

Different manufacturers have a different idea of what is med or large. I’m 6′1″ 200 lbs. and I wear a large to x-large, all according to manufacturer.Leather surprises usually don’t work to well. I’d just take him with you. He may not want another jacket. I’ve had mine since1985 and I’m not trading any time soon.

Get his chest measurement, under the armpits, while he is wearing a comfy sweater. Then you can compare size with chest measurement (they’re usually about the same).

If you’re surprising him, be sure the jacket has built in “CE armor” for the spine.

go one size larger so he can wear a sweatshirt under…..

42 ” chest get 42″ chest just like buying any other jacket

Usually, when a size is stated (like a size 42), that’s the chest measurement, going under armpits.

I’m 5′10 183lbs I wear a size 38 or Medium leather.
I’ve weighed as much as 205 and still wore my 38/ medium. It was just a little harder to layer in for colder weather.
Hope this helps

like look at any of his jackets should get a size

Make sure he likes surprises……we get kinda attached to our “old” leathers……….(;o)

get a larger size than he would wear my husband wears a 2x and he had to get a 3 x