2.5" with metal back and horizontal barpin. This button is more often seen with a b/w photo but here the photo is blue tone. The Hake guide shows only the b/w photo variety but this version is pictured in the recently released book titled "The Campaign Items of John F. Kennedy" produced by Harvey Goldberg, director of the club Kennedy Political Items Collectors. This incredible catalog of JFK items is a must for any serious collector and the author can be reached at: heg1@verizon.net. Cello has couple of tiny air dots with a narrow .25" long mark at the far right but this is all as made and these marks barely show. Outstanding clean condition with just the tiniest oxidation on the metal back. Exc. and displaying Mint as made.