I wear a size 32 in almost every Diesel I own. I have many Darrons (8sm, 8sv-sold, 88z, 8ih, 8b9, ...) all except the 88z fit great. the 88z is a size 33, so I had to take them to the tailor to make them slimmer in legs. He also slimmed the crotch and they now fit me well too. If I could I would buy the 88z for a small price in size 32.
that's all I can tell you. Stretch doesn't mean that the jeans doesn't give a bit. my thanaz 8dk stretched out a ton. btw, I've sold my 8sv to buy the 8b9. was a very good deal. both are made in Romania but the 8b9 is a better wash, much better.