Macrophilia refers to sexual fantasy involving fictitious giants, primarily giant women.[1] Variants include metamorphic fantasies; the diminution of men so that average-sized women appear relatively huge, or more commonly, ordinary women growing to giant size.

Humorist David Sedaris's essay, "Giantess", reprinted in Barrel Fever (1994),[2] describes writing for a magazine specializing in erotic stories about giant women and the particular attention that must be paid to the transformation and tearing of clothes.