These are original vintage 1930s era paper adverts from Japanese shipping/travel guide books.
They all measure in a range of between approx 6" to 6 1/2" long x 4" to 4 1/2" wide (please see 2nd image showing the 12" ruler to give an idea of scale); there will be unrelated printing on the reverse side.
They are in good shape for their age but please review the photos/scans to best establish condition prior to purchase.
The items will be placed in a clear plastic protective sleeve & sent in a hard backed envelope.