What is the standard size of beds in US?

Twin / Single - 38 × 75 in

Double / Full - 53 × 75 in

Queen - 60 × 80 in

King - 76 × 80 in ; Twin Extra Long : 38 × 80 in (0.99 × 2.03 m) : This size is fairly popular in college dormitories. ; Super Single : 48 × 84 in (1.22 × 2.13 m) ; Olympic Queen : 66 × 80 in (1.68 × 2.03 m) a novelty size by Simmons ; California Queen : 60 × 84 in (1.52 × 2.13 m) ; Eastern King : 76 x 80 in (1.93 x 2.03 m) : An alternate name for a U.S. King. ; California King : 72 × 84 in (1.83 × 2.13 m) : also called a Western King, West Coast King, or WC King. ; Long King : 72 x 104 in (1.83 m × 2.64m)