2×4 or two by four may refer to:
Music , a time signature in music 2×4 (Guadalcanal Diary album), 1987 2×4 (Einstürzende Neubauten album), 1984 2×4 (Malachi Favors and Tatsu Aoki album), 1999 Two by Four, 1989 album by Marc Johnson "2 X 4", a 1996 song by Metallica from their album Load "2×4", a 1995 song by Blind Melon from their album Soup "2×4", a 1984 song by The Fall from their album The Wonderful and Frightening World Of... "2×4", a 1988 song by The U-Men from their album Step on a Bug
Other uses 2by4 or 2x4, a 1998 American drama film 2 inch × 4 inch profile dimensional lumber 2×4 Roller Derby, a women's roller derby league in Argentina Jonny 2×4, a character on the cartoon Ed, Edd n Eddy
See also 4x2 (disambiguation)