The size of something is how much space the thing takes. It can also be described as how big or small something is.

Sizes can be measured. When a size is measured, it is given a number.^[1] for comparison.

It can be measured with different types of systems, example: the metric system.

Metric: 1 cm= 10 mm, 1m= 100cm, 1km= 1000m and so on...

little

smaller/little is very small, as in short.

• small means "little"
• tiny means "very little"

big

• large means "big"
• huge means "very big"

Small and big are opposites. (There are more words for big and little, examples are: gigantic, microscopic, short, tall, etc)

Example 1

• A yellow box is 2 metres long, 3 metres wide and 1 metre deep. The box has a volume of 6 cubic metres.
• A green box is 3 metres long, 3 metres wide and 1 metre deep. The size of the green box is 9 cubic metres.

The green box is larger in size than the yellow box.

Example 2

• A red box is 2 feet long, 3 feet wide and 1 foot deep. The box has a volume of 6 cubic feet.
• A blue box is 3 feet long, 3 feet wide and 1 foot deep. The size of the blue box is 9 cubic feet.

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