What does 31 centimetres look like?

31-Centimetre Distance Comparisons

• 31 centimetres is about 2.6 times the diameter of a standard compact disc.

  Using the source measurement of 12 centimetres, this comparison puts the target at 2.6 of it.

  Source: Ecma International

• Measured against the height of a tennis net at centre, 31 centimetres spans about 34% of that reference.

  The comparison uses the published dimension, converted into the same unit before the proportion is calculated.

  Source: International Tennis Federation

• Measured against the long side of a €200 note, 31 centimetres spans about 2 times that reference.

  Using the source measurement of 15.3 centimetres, this comparison puts the target at 2 of it.

  Source: European Central Bank

• 31 centimetres is about 52% of the long side of an A2 sheet.

  Its published measurement is 59.4 centimetres; the ratio is calculated from that figure.

  Source: International Organization for Standardization

• 31 centimetres is about 11% of the length of a table-tennis table.

  Using the source measurement of 274 centimetres, this comparison puts the target at 11% of it.

  Source: International Table Tennis Federation

• 31 centimetres is about 10% of the height of a regulation basketball rim.

  The comparison uses the published dimension, converted into the same unit before the proportion is calculated.

  Source: FIBA

• 31 centimetres is almost exactly the same distance as the short side of an A3 sheet.

  Its published measurement is 29.7 centimetres; the ratio is calculated from that figure.

  Source: International Organization for Standardization

• 31 centimetres is approximately 12.2 inches.

  Using the exact conversion that 1 centimetre equals exactly 0.3937007874 inches, the unrounded result is 12.205 inches.