(Post)cards from Hotels i've stayed. Usually i sent them when I stay there, but sometimes I have more and save them for future.
They could have some printed text. But not necessary. Its sort of ADcards, but i really liked them, otherwise they left in hotel :)

Metropol Moscow, Russia - 4 big size cards (185*130) and 1 folded one with nice old photo.

Real postcards:
Bird - Guangzhou, China.
Hong Kong Conrad - i've sent a lot, sadly they had only 2 style :(