If you look at Zam in his own clothes (I think that is him), he probably has similar body shape to you and wears the label well FWIW. Size accordingly. The specific linen trousers are cut very slim knee down and taper a lot especially with the j-shape/twist of the inseam.
TBH I think Notcone is wearing the ZB badly. ZB has a very unique style to his design and cut but the way it is worn in said photo does not make it any different than some black bottoms from 'XYZ'. You can't even see the twisted seam for all its glory. Though the hand and material is definitely something you appreciate more in person, I guess.