In Chapter 4, Part 1 of "Alice's Adventures in Wonderland," Alice's changing size has significant implications for the plot. At one point, she grows large after consuming a cake, which leads to her being trapped in a room in the Rabbit's house. This situation creates a sense of confinement and urgency as Alice struggles to resize herself to escape.
The Rabbit mistakes Alice for his housemaid, Mary Ann, which adds a layer of confusion and humor to the story. This misunderstanding further complicates Alice's situation, underscoring her alienation in Wonderland as her identity is overlooked.
Additionally, her size changes affect her interactions with other characters. At one moment, she may intimidate the other characters due to her size, shifting the dynamics of her encounters.
Overall, Alice's fluctuating size serves as a catalyst for the unfolding events, illustrating themes of identity and the nonsensical nature of Wonderland.