Conversation so far:
who introduced the first floppy disk in 1967
The 8-inch disk later called a diskette, is known as the floppy disk drive today,  invented at IBM by Alan Shugart in 1967.
how many inches was the first floppy disk
The first floppy drives used an 8-inch disk, which evolved into the 5.25-inch disk that was used on the first IBM Personal Computer in August 1981.
Is the floppy disk still 5.25-inch today
By mid-1980s, the improved designs of the read/write heads, along with improvements in the magnetic recording media, created the less-flexible, 3.5-inch,1.44-megabyte capacity FDD in use today.
why the name floppy disk
The 5.25-inch disks were dubbed floppy because the diskette packaging was a very flexible plastic envelope, unlike the rigid case used to hold today's 3.5-inch diskettes.

Question: does anyone still use the first version
Self-contained rewrite: does anyone still use the 8 inch floppy disks