Don't just take my word for it though, do some research.
A quick google search say the standard 204/205 tyre size is 215/50/16.
To get the same circumference in a 19" (so your speedo is still accurate), you would need to go with a tyre around 225/30/19. No one makes them
There are some 225/35/19's around. Not as expensive as i thought they might be, but there isn't much of a choice in brand/type.