Topps was really cranking out sets after their 1966 move to Duryea, PA seemingly freed up their New Product Development folks, with a number of odd and oversized issues, often posters, starting to appear with regularity. Unless they were issued with a sports theme, the posters, much like the card sets of the time, took on a smart-alecky tone in most cases. A perfect example of this is the 24 subject set from 1967 called Wanted Posters, which measure 10" x 18 1/2" in size.
There are hard to take images of so forgive the wrinkles below. This is a very typical example and shows how the poster was folded to fit the pack: