8 mm

8 mm may refer to:

Film technology

 * 8 mm film, a motion picture film format
 * Super 8 film
 * Single-8 film
 * 8 mm video format, three related videocassette formats

Firearms

 * 8 mm caliber, firearmm cartridges
 * 7.92×57mm Mauser, designated 8 mm Mauser

Arts and entertainment

 * 8mm (band), a rock band from Los Angeles, California
 * 8mm (film), a 1999 American crime thriller