21.52 centimeters is equal to 8.47 inches.
Here are some comparisons to known objects of similar size:
1. A standard banknote (such as a US dollar bill) is approximately 6.14 inches long. This means that 21.52 centimeters is approximately 2 inches longer than a banknote.
2. The average length of a standard pencil is about 7.5 inches. This means that 21.52 centimeters is just over an inch longer than a pencil.
3. A sheet of standard letter paper (8.5 inches by 11 inches) is approximately 21.59 centimeters by 27.94 centimeters. This means that 21.52 centimeters is just slightly shorter than the shorter side of a sheet of letter paper.
4. The average length of a snooker cue is about 57 inches. This means that 21.52 centimeters is just over 1/4 of the length of a snooker cue.