2x4

2x4, two-by-four, or two by four may refer to:

Lumber

• A two-by-four is a common size of dimensional lumber

Music

• 2X4 (Guadalcanal Diary album), a 1987 album
• 2X4 (Einstürzende Neubauten album), a 1984 album
• "2 X 4", a 1996 song by Metallica from their album Load
• "2 X 4", a 1995 song by Blind Melon from their album Soup
• "2 x 4", a 1984 song by The Fall from their album The Wonderful and Frightening World of The Fall
• 2/4, a time signature, often used for polka, march, some Argentine tango

Other

• "2 by 4", a "secret menu" item at In-N-Out Burger
• 2by4, a 1998 film by Jimmy Smallhorne