A metric unit of length.

Examples:
A paper clip is about 1 centimeter wide.
A staple is about 1 centimeter long.
A pinkie finger is about 1 centimeter wide.

A U.S. unit of length.

Examples:
A ruler is 1 foot long.
A notebook is about 1 foot long.
A football is about 1 foot long.

A U.S. unit of length.

Examples:
A paper clip is about 1 inch long.
A quarter is about 1 inch wide.
The side of a connecting cube is about 1 inch long.

A way to show data with Xs or other marks above a number line. Each mark represents 1 number or 1 measurement.

A metric unit of length.

Examples:
A baseball bat is about 1 meter long.
A yardstick is about 1 meter long.
A door is about 1 meter wide.