Here is a 1989 Ralston TMNT Teenage Mutant Ninja Turtles Empty Cereal Box Free Poster . Yes, I collected some of these boxes, this one came out in 1989 I think, it's folded flat, some of the box where it is glued together might have an issue when taken apart, but anywhere that shows the box itself is in very good condition. It will be sent flat as in the picture. The box is 9" x 13 1/4 ". This is just for the empty box only, no cereal in here and no prize or premium, but is does have a nice picture of one of the posters you can send for.
Thanks for looking
My pictures are part of the description.
ALWAYS ENLARGE THE PHOTOS FOR BEST VISUAL DESCRIPTION.