Confinement in the Alice books is almost always literal and physical (for instance, when Alice gets stuck in the White Rabbit's house). Freedom is gained by ingenuity and imagination, which create sensations of lightness and make escape possible. However, confinement also has a protective aspect; sometimes our heroine confines others in order to shelter them from danger. This in turn makes us wonder whether there are reasonable limits on freedom that are necessary for safety. While imagination and fantasy offer escape routes, they can also introduce new and unknown dangers.
Alice's Adventures in Wonderland depicts growing older, represented by growing larger, as an unpleasant process that creates a feeling of confinement.
Although Alice often feels trapped when she grows larger, she also feels vulnerable when she grows smaller, suggesting that childhood is an imperfect balance of youthful freedom and adult strictures.