Unusual types of gramophone records Unusual types of gramophone records The overwhelming majority of records manufactured have been of certain sizes (7, 10, or 12 inches), playback speeds (33, 45, or 78 RPM), and appearance (round black discs). However, since the commercial adoption of the gramophone record (called a phonograph record in the U.S., where both cylinder records and disc records were invented), a wide variety of records have also been produced that do not fall into these categories, and they have served a variety of purposes. The most common diameter sizes for gramophone records are 12-inch, 10-inch, and 7-inch. Early American shellac records were
Drum kit cymbals on stands takes longer, particularly if there are many of them, and cymbals are easily damaged by incorrect mounting, so many drummers prefer to bring their own cymbal stands. See Common configurations below for typical drum sizes. Traditionally, in America and the United Kingdom, drum sizes were expressed as "depth x diameter", both in inches, but many drum kit manufacturers have since begun to express their sizes in terms of "diameter x depth"; still in the measure of inches. Manufacturers using the American traditional format in their catalogs include these: Those using the European measures of diameter x depth