A king-sized bed differs from the other sizes in implementation, as it is not common to have a king-sized box spring; rather, two smaller box-springs are used under a king-sized mattress. On a U.S. Standard or “Eastern” King, the box springs are identical in size to a Twin Extra-Long.
Standard sizes
Modern manufacturing conventions have resulted in a limited number of standard sizes of commercial bedding for mattresses and box springs. They vary by country of origin.
| U.S.[3] | Australia[4] | UK[5] | Europe | |
|---|---|---|---|---|
| Twin / Single | 39 × 75 in 97 × 191 cm |
36 × 75 in 91 × 191 cm |
35 × 79 in 90 × 200 cm |
|
| Double / Full | 54 × 75 in 137 × 191 cm |
55 × 79 in 140 × 200 cm |
||
| Queen (UK King) |
60 × 80 in 152 × 203 cm |
60 × 78 in 152 × 198 cm |
63 × 79 in 160 × 200 cm |
|
| King (UK Super King) |
76 × 80 in 193 × 203 cm |
72 × 80 in 183 × 203 cm |
72 × 78 in 183 × 198 cm |
71 × 79 in 180 × 200 cm |
The sizes in the UK, other than the Double, vary compared to the U.S. sizes, being generally smaller. The U.S. Queen corresponds to UK King and King to Super King. The European or continental basic sizes are similar to the UK but have a set length of 2 metres. The denominations Queen, King and Super King are not used in continental Europe, and Double refers to 140cm or any higher width. Instead of these US/UK denominations, the bed width is given in centimeters.
These dimensions are for the mattress—the actual bed frame will be a little bigger in order to fully encompass and support the mattress. The thickness of the mattress may vary considerably.
Historically[attribution needed], Single referred to a bed size that was half the width of a Double, that is, approximately the width of one pillow. In Western nations, such beds have become quite rare, with a Twin bed becoming the standard for one-person sleeping.[citation needed] Without another common use for the term Single and with the term Double being widely used, Single has come to be another term for a twin bed in these places.
Portable cots are generally the size of original single beds.[citation needed]
Other U.S. sizes
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- Twin Extra Long
- 38 × 80 in (0.99 × 2.03 m)
- This size is fairly popular in college dormitories.
- Three Quarter
- 48 × 75 in (1.22 × 1.90 m) often (47-48) X 72 in. sizing varies.
- This size is considered obsolete by the major manufacturers.
- 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)
- A common size on the West Coast of the United States, also called a Western King, West Coast King, or WC King.
- Long King
- 72 x 104 in (1.83 m × 2.64m)[citation needed]
Other UK sizes
- Small Single
- 30 × 75 in (0.76 × 1.91 m)
- Super Single
- 42 × 75 in (1.07 × 1.91 m)
- Small Double / Three Quarter
- 48 × 75 in (1.22 × 1.91 m)
- Normal Double
- 54 x 75 in (1.37 x 1.91 m)
Other European sizes
Modern continental Europe practice is to refer to a bed by explicit width or size (”80 cm bed” or “80×200 cm bed”).[citation needed] Other sizes found include:
- Extra Small Single
- 0.75 × 2 m (30 × 79 in)
- Small Single
- 0.8 × 2 m (31 × 79 in)
- Large Single
- 1 × 2 m (39 × 79 in)
In France, the length of older beds is sometimes 1.9 m instead of 2 m.[citation needed]
Other Australian sizes
- Single Extra Long
- 0.92 x 2.03 m (36 in by 80 in)
- King Single
- 1.06 × 2.03 m (41 × 80 in)
Other New Zealand sizes
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The following bed sizes are available in New Zealand:[6]
- Long Single
- 0.90 × 2.03 m (35 × 80 in)
- King Single
- 1.05 × 2.03 m (41 × 80 in)
- Long Double
- 1.35 × 2.03 m (53 × 80 in)
- King
- 1.65 × 2.03 m (65 × 80 in)
- Super King
- 1.80 × 2.03 m (71 × 80 in)
- Californian King
- 2.00 × 2.03 m (79 × 80 in)