17 centimeters is equivalent to 6.69 inches.
Some comparisons to objects of similar size are:
1. The average length of a dollar bill (6.14 inches)
2. The height of a standard pencil (7 inches)
3. The length of a standard chocolate bar (7 inches)
4. The width of a DVD case (5.31 inches)
5. The diameter of a standard CD (4.72 inches)