Answer: Line #2. ✅

At first glance, many people choose a different line because of the way the image is framed. The illusion tricks your brain into misjudging the lengths.

The key detail is that Line #2 extends farther than the others. While lines 1, 3, 4, 5, and 6 remain inside the inner border, Line #2 reaches all the way to the outer frame, making it the actual longest line.

Did you spot #2 on your first try, or did the optical illusion fool you? 🤔 Share your answer in the comments!