Available here is the cinderella stamp as shown in the photograph.
(Each square on blue grid is 10mm x 10mm.)

What are Cinderella Stamps?
In philately, a cinderella stamp is "virtually anything resembling a postage stamp, but not issued for postal purposes by a government postal administration..." The term also excludes imprinted stamps on postal stationery.
As cinderella stamps are defined by what they are not, there are many different types and the term is usually construed fairly loosely. Items normally regarded as falling within the area are poster stamps, propaganda labels, commemorative stickers, stamps issued by non-recognised countries or governments, labels like Christmas seals and Easter seals, most telegraph stamps, some railway stamps, some local stamps and purely decorative items created for advertising or amusement.