I want to know the answer to the following question:
How small were the earliest discs released?
All the background I'm provided with is that "In the 1890s, the recording formats of the earliest (toy) discs were mainly 12.5 cm (nominally five inches) in diameter; by the mid-1890s, the discs were usually 7 in (nominally 17.5 cm) in diameter.". Is that enough to answer the question?