2×4

2×4，二乘四，可以話：

• 2×4係一種普通尺寸嘅要求規格尺寸慨木材，其尺寸通常為1×3吋。

電影同埋電視

• 2by4，也稱為2×4，Jimmy Smallhorne嘅1998嗰套戲

體育

• 2×4滾軸打比，女子平跑道滾輪打比聯賽，總部喺阿根廷布宜諾斯艾利斯。

車

• 2×4，指慨系一種帶有四輪驅動懸架嘅兩輪驅動慨皮卡車。

音樂

• 2×4 (Guadalcanal Diary album), a 1987 album
• 2×4 (Einstürzende Neubauten album), a 1984 album
• "2×4", 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 The Fall
• "2x4", a 1988 song by The U-Men from their album Step on a Bug
• 2/4, a time signature, often used for polka, march, and some Argentine tango
• Two by Four, an album by jazz bassist Marc Johnson