Name a tool that you can use to measure the circumference of an object.

A tape measure.

A tool commonly used to measure the circumference of an object is a flexible measuring tape, also known as a tailor's tape or a measuring tape. To measure the circumference of an object using a measuring tape, follow these steps:

1. Align the starting point of the measuring tape with a reference point on the object's circumference.
2. Wrap the measuring tape around the object, ensuring that it follows the contour of the surface without any gaps or overlaps.
3. Hold the tape firmly in place, making sure it doesn't slide or move, and note down the measurement where the tape meets or overlaps itself.
4. Take the reading in inches, centimeters, or any other unit marked on the tape.
5. This measurement represents the circumference of the object.

By using a flexible measuring tape, you can easily measure the circumference of objects such as pipes, tubes, or any other round or curved surfaces.