## Metric units of length

**Millimeters (mm):**

We can use millimeters to measure things like the width of a small button, the length of an insect, or the size of tiny beads on a necklace.

**Centimeters (1 cm=10 mm):**

**Meters (1 m = 100 cm):**

Meters are great for bigger measurements. You can use meters to measure how tall you are, the length of your classroom, or the width of a soccer field.

**Kilometers (1 km = 1000 m):**

Kilometers are used for really long distances. You might use kilometers to measure the distance between your home and school, the length of a hiking trail, or the distance between cities on a map.

So, millimeters are for tiny things, centimeters for small things, meters for medium-sized things, and kilometers for really big things!

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