The original poster was printed on uncoated index stock and measures approximately 13⅞″ x 22″.
The postcard comes in two varieties, both of which measure approximately 4⅝″ x 7⅛″:
The Type A card has a “place stamp here” reverse.
The Type B card has a calendar of Bill Graham events on the back.
A double postcard was also printed. This card bears the images of both BG-123 and 124 and measures approximately 4⅝″ x 14½″. It has a bulk rate permit on the back. In addition, some copies were addressed and mailed to people on the mailing list.