Cardboard Heroes is a line of miniatures published in 1980 by Steve Jackson Games.
An extension, Cardboard Heroes Champions Set 3: Enemies, was published in 1984.
Denis Loubet designed a set of miniatures called Cardboard Heroes (1980), a set of 40 full-color 25mm cardboard figures for use in fantasy roleplaying games, published by Steve Jackson Games (SJG).
[1] Feldman commented that "they are beautiful, they are inexpensive, and if you like them and have no objection to cardboard, they are certainly worthwhile.
"[1] Craig Sheeley reviewed Cardboard Heroes Champions Set 3: Enemies in The Space Gamer No.