1990s Raw Denim Jacket 
Helmut Lang - Italy.
Best Fit UK8/10 - will be fitted on a UK12 BUT beware the arms are slim fit.
I am a PT / Bodybuilder and I can get the jacket on as a muscly UK12 but my biceps are too big for it.
The arms are long which i love - sleeves down to the hands.
Slender tall UK12 or below - UK10
Tagged as Medium/42
37inch chest
22inch long 
25inch long sleeve
16inch Back
I take 3 days to process sales.
RM or Evri