How these survived the last 30 years I'll never know, but did anyone else own the "Giant Comics To Color" published by Whitman?
I have three of them, two Superman and one Batman.
Batman and Robin battle The Joker in "Comedy of Tears".
Superman battles "Brainiac's Biggest Plot".
Superman in "Luthor's Lost Land".
These big black-and-white comics are about 11 x 15 inches, or 27.5 x 37.5 centimetres.