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Look up size matters in Wiktionary, the free dictionary.
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