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.

Question: Still the same size today
Self-contained rewrite: Is the floppy disk still 5.25-inch today