It's hard to say a specific object is *exactly* one centimeter long, as objects vary in size. However, here are some examples of things that are approximately one centimeter in length:

* The width of a typical pencil lead

* The diameter of a dime

* The length of a paperclip

* The width of a fingernail

* The thickness of a credit card

Keep in mind that these are just approximations! The actual length will vary depending on the specific object.