The original/first print poster measures approx.  13 1/2" x 22 1/2" (we do have some originals that measure as narrow as 12 1/2", which means the "cut" of the posters does vary within the run), and was printed prior to the shows on vellum paper stock.  This stock is noticeably thinner than the stock used for the second print posters.  There is also a subtle color difference between this poster and the reprint poster.  The color of this poster to the right of the "s" in "Mothers" is rust.

The second print poster, an authorized reprint, measures approx.  13 1/2" x 22 1/2", and was printed on a sturdy/smooth index paper stock.  This is the same paper stock that was used to print Fillmore original posters from March, 1967, through 1968 (which is when this poster would have been printed).  The color of this poster to the right of the "s" in "Mothers" is a pale orange.

There are three variations of the original post card.  All measure approx.  4 3/4" x 8", and were printed prior to the shows on vellum paper stock.

This card, Type A, is mostly blue in color.  This matches the blue at the top of the poster.  Cards exist with both "place stamp here" and "bulk rate" (some of these were mailed)  backs.

This card, Type B, transitions from a blue color on top to red on the bottom (green in the middle), and very much resembles the color scheme of the poster.  Cards exist with both "place stamp here" and "bulk rate" (some of these were mailed) backs.

This card, Type C, is mostly red in color.  This matches the red at the bottom of the poster.  Cards exists with both "place stamp here" and "bulk rate" (some of these were mailed) backs