“Alice in Wonderland syndrome is a brain-related condition that disrupts how you perceive your own body, the world around you or both. Named for a famous children’s storybook, this rare condition makes things look or feel larger or smaller than they actually are. It can happen for several reasons, many temporary or treatable.

Alice in Wonderland syndrome (AIWS) disrupts your brain’s ability to process sensory input. The disruption affects how you perceive the size of things you see around you, the feel or look of your own body, or both. It can also distort your sense of reality.”

Cleveland Clinic (Alice in Wonderland Syndrome (AIWS): Symptoms & Treatment)