can i pass 158cm bag for 150cm one in emirates airline or do they check the dimensions strictly
I have a Rimowa 32" that probably exceeds that if you include the wheels - it's never been an issue. But watch your weight...big suitcases fill up and you may have issues if any one piece is more than 32kg (even if you have the allowance)!
I think this is more to do with policing checking in something very thin and long - like a flat screen TV (yes, it happens a fair amount).