Pinocchio’s nose is his best-known characteristic. It grows in length when he tells a lie: this appears in chapter XVI. It should be noted how Collodi himself, in Note gaie claims how “to hide the truth of a speculum animae (mirror of the soul) face [ … ] is added to the true nose another papier-mache nose”. There is an inconsistency, however, because his nose grows when it is first carved by Gepetto, without Pinocchio ever lying.
The nose only appears a couple of times in the story, but it reveals the Blue Fairy’s power over Pinocchio when he acts disobediently. After struggling and weeping over his deformed nose, the Blue Fairy summons woodpeckers to peck it back to normal.