00

00, double zero or variants may refer to:

Arts and entertainment

 * 00 Agent, a fictional agent with a license to kill in the James Bond media
 * Symphony No. 00 (Bruckner), an alternate name for Bruckner's Symphony in F minor
 * "Double Zeros", an episode of Runaways
 * Double Zero Records, a record label

Science and technology

 * 00 gauge, or OO gauge, a standard for model railways
 * 00, a common international call prefix
 * 00, an American wire gauge size
 * 00, a Very Fine grade of steel wool
 * 00, a shotgun ammunition size for buckshot

Other uses

 * years such as 1900, 2000, 2100
 * Size 00, a women's clothing size in the US catalog sizes system
 * 00, a pocket on some roulette wheels
 * 00, a grade of Italian flour