i bet that Isaia jacket has an Drop 8 ?!Yes I have an Isaia jacket. It's a moderate slim fit. Not bad, but I prefer more classic cuts from Canali and Zegna.
Canali and Zegna also offers from Drop 6 to Drop 10
Attolini has only Drop 7 most of their RTW
Kiton has everything....you go nuts if you want bespoke from them