Size facts for kids

Size tells us how big or small something is. It describes how much space an object takes up. We can measure size using numbers. This helps us compare different things, like a tiny ant and a huge elephant.

Words for Sizes

We use many words to describe how big or small something is.

Describing Small Things

• Small means little.
• Tiny means very, very little.

Describing Big Things

• Large means big.
• Huge means very, very big.

Small and big are opposites. This means they are completely different.

How We Measure Size

We often measure size using things like length, width, and depth. When we multiply these numbers, we find the volume. Volume tells us the total space an object fills.

Example with Meters

Imagine two boxes:

• A yellow box is 2 metres long, 3 metres wide, and 1 metre deep. Its volume is 6 cubic metres (2 x 3 x 1 = 6).
• A green box is 3 metres long, 3 metres wide, and 1 metre deep. Its volume is 9 cubic metres (3 x 3 x 1 = 9).

The green box is larger in size than the yellow box because it has a bigger volume.

Example with Feet

Now, let's look at two more boxes:

• A red box is 2 feet long, 3 feet wide, and 1 foot deep. Its volume is 6 cubic feet (2 x 3 x 1 = 6).
• A blue box is 3 feet long, 3 feet wide, and 1 foot deep. Its volume is 9 cubic feet (3 x 3 x 1 = 9).

The blue box is larger in size than the red box.

Images for kids

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  This picture shows how different planets and stars compare in size. It helps you see how huge some stars are compared to Earth!

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  Here's a tiny finch egg next to a dime. If you know how big a dime is, you can guess the size of the egg.

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  This photo uses a trick called Forced perspective. It makes the Sphinx look like it's touching the person, making it hard to tell their true sizes.

See also

In Spanish: Tamaño (medida) para niños