"Edison Diamond Disc" was recently added but there is a need for a more general format because "Edison Diamond Disc" is just one company's version
of the product and it stopped being produced in the late 1920's. The Shellac/78rpm market slowly died out when vinyl became the new standard in the 1950's.

See this for more information: https://en.wikipedia.org/wiki/Gramophone_record

Three examples from other websites:

• Discogs use the term "Shellac" which often is combined with 78 RPM and 10". http://www.discogs.com/search/?type=all&format=Shellac&advanced=1
• 45worlds use the term "78 RPM record" http://www.45worlds.com/78rpm/
• Archive.org use the term "78 RPM" https://archive.org/details/78rpm

45worlds have the following sizes: 6", 7", 8", 9", 10" and 12" (discogs' list also includes 11").