Size Matters (disambiguation)

Size Matters is an album by the band Helmet.

Size Matters may also refer to:
 * Cultural and sexual perceptions of the size of the human penis
 * "Size Matters (Someday)", a hit country song recorded by Joe Nichols
 * "Size Matters" (Charmed), an episode of the US television series Charmed
 * "Size Matters", the second episode of the UK television series Coupling
 * Size Matters, the second issue of the comic book M. Rex
 * Ratchet & Clank: Size Matters, a video game for PSP and PS2
 * Size does matter, the tagline of Godzilla (1998 film), a humorous comparison to dinosaur movies