Which orange slice in the center is bigger?

Once you think you know the answer, click on the illustration to compare the sizes of the orange slices in the center!

This picture shows a fun optical illusion called the "Ebbinghaus illusion." The size of the orange slice in the middle looks different because of the size and number of orange slices around it.

In the left picture, the orange slice in the middle is surrounded by big orange slices, making the middle slice look smaller. In the right picture, the orange slice in the middle is surrounded by small orange slices, making the middle slice look bigger. But actually, both middle slices are the same size. This shows how the things around something can change how we see it.

It's like thinking a basketball player is small when standing next to other basketball players, but big when standing next to average people.