Stupid incorrect. I meant steerhide.
Even thin horse, due to the density of the hide, is tough to deal with.
On the topic of RO sizing, I'm considering ordering one of his leather jacket. I fit a 40 or 42 in a men's suit and I've heard RO fits smallish. If that's the case, is a 52 euro a good idea, assuming I'm looking for a nice fit and not too tight or too baggy, or should I go up to a 54? Not sure what the stretch factor is either - if there's a bit of give maybe a 52 is ok. I have no idea..