What becomes half the size when we turn it upside down?

The answer to this riddle is the number "6." When you turn it upside down, it appears as "9," which can be considered as half the size (figuratively speaking) in terms of the numerical representation or visual perspective. Update (2024-09-26): The answer to the riddle "What becomes half the size when we turn it upside down?" is the number "6." When you turn the number 6 upside down, it resembles the number 9, which can be interpreted as "half the size" in a playful sense.