The height of "1" depends on the unit being referred to. If you mean 1 foot, it is equal to 12 inches or 30.48 centimeters. If you can specify the unit (such as 1 inch, 1 meter, 1 centimeter, or 1 foot), a more precise height conversion can be provided. For example:

• 1 foot = 12 inches = 30.48 cm
• 1 inch = 2.54 cm
• 1 meter = 100 cm = approximately 3.28 feet

Please let me know the unit for the number "1" you are referring to.