What does it mean for things to be equal in size?

When things are equal in size, it means they take up the same amount of space, just like two identical blocks from your building set.

Imagine you have two toy blocks. One is red, and one is blue. If you put them side by side on the floor, and they look exactly the same, same height, same width, same length, then they are equal in size. You could stack them on top of each other and not notice any difference.

Think about a pair of socks. Each sock is for one foot. If you put both socks next to each other, and they match perfectly, neither one is bigger or smaller, then those socks are equal in size too. That’s why they work so well together!

Now think of two cookies on a plate. If both have the same shape and take up the same space on the plate, then those cookies are also equal in size. You could even share them equally with your friend, one cookie each!

So whether it's blocks, socks, or cookies, being equal in size means they're exactly the same when it comes to how much room they take up.