It is to suit the Classic Airships range of 1:700 scale airships available in the Shapeways marketplace:
for example, for the R-Type Zeppelin go to Shapeways, click on Marketplace and enter NZU9NC2W3 in the search bar to bring up the model.
These are the white markings as applied to all operational German Navy Zeppelins which had black envelopes from 1917 until the end of WW1. Every 'ship number is included from L30 to L72 with characters matching photographs of the originals wherever possible. Cut out each marking using sharp scissors.
I recommend always using a good decal softener such as either Revell "DECAL Soft” or Tamiya "MARKFIT STRONG".
International letter post (without tracking) is INCLUDED IN PRICE
Nominal size: 105 mm x 75 mm