Peanuts is a syndicated daily and Sunday American comic strip written and illustrated by Charles M. Schulz, which ran from October 2, 1950, to February 13, 2000, continuing in reruns afterward.

The comic strip is the most popular and influential in the history of comic strips.

Snoopy is Charlie Brown’s pet beagle in Peanuts. He can also be found in all of the Peanuts movies and television specials, like The Peanuts Movie. Since his debut on October 4, 1950, Snoopy has become one of the most recognizable and iconic characters in the comic strip.

Cards are small and measure 2.5 by 1 and 5/8.  

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Source: Ebay.com