All are different. Folded as issued sizes range from 3.25x7.25 to 4x9”. Issued by gasoline companies, Greyhound, hotels, ship lines, etc. 68 have Trylon and Perisphere images on front. Many have other Fair scenes as well as interesting text regarding prices, things to see, etc. A few are VG w/moderate wear, but most are Fine to Exc. A huge instant collection.