A human egg, or ovum, is one of the largest cells in the human body, but it's still very small. It measures approximately 0.12 mm in diameter. To put that into perspective, you would need nine eggs to reach a millimeter in length, and if you laid 100 of them side by side, they would only stretch 12 mm (1.2 cm) long.
That's about the size of a strand of hair.
Human eggs are large compared to other cells because they need to contain enough nutrients to support a growing embryo after fertilization.
