A bed is a piece of furniture or location primarily used or intended for sleeping upon, but also commonly used for sexual activities, relaxing, sitting, watching television, and reading.

Beds come in a wide array of shapes and sizes. Early beds were little more than piles of straw or some other natural materials. An important change was raising them off the ground, to avoid drafts, dirt, and pests.

To make beds more comfortable the top layer is frequently a mattress. Originally these were bags of straw for most people and filled with feathers for the wealthy. Eventually new fillings such as cotton and artificial fillers became common. In modern times most mattresses use springs, solid foam, water, or air.

At the top of the mattress, to provide greater support for the head, most people use a pillow. Also used is some form of covering blanket to provide warmth to the sleeper, often bed sheets, a quilt, or a duvet.

The bed frame may simply be made of wood or metal, but many also use springs. Most expensive and bulky, but also strong and comfortable is a box spring or divan, a large mattress-sized box containing wood and springs. A dust ruffle, bed skirt, or valance sheet may be used to make the bed frame match the rest of the bedding.

History

---

Ancient Rome

Ancient Romans had various kinds of beds for repose. These included:

• lectus cubicularis, or chamber bed, for normal sleeping;
• lectus discubitorius, or table bed, on which they ate—for they ate while lying on their left side—there being usually three people to one bed, with the middle place accounting the most honorable position;
• lectus lucubratorius, for studying;
• and a lectus funebris, or emortualis, on which the dead were carried to the pile.

Bed sizes

---

Most countries have a standard set of four sizes of mattress. While the Double size appears to be standard among English speaking countries, based on the imperial measurement of 4 ft 6 in by 6 ft 3 in, the sizes for other bed types tend to vary. The European sizes differ; they are based on the metric system.

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 boxsprings 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 somewhat by country of origin.

Width by length. Metric sizes (Europe) rounded to nearest half decimetre; inch sizes (U.S., UK, Australia) rounded to nearest inch.

	U.S.	UK	Australia	Europe
Single, Twin	39 in × 75 in	36 in × 75 in	36 in × 75 in	36 in × 79 in
	1 m × 1.9 m	0.9 m × 1.9 m	0.9 m × 1.9 m	0.9 m × 2 m
Double, Full	54 in × 75 in	54 in × 75 in	54 in × 75 in	55 in × 79 in
	1.35 m × 1.9 m	1.35 m × 1.9 m	1.35 m × 1.9 m	1.4 m × 2 m
Queen	60 in × 80 in	60 in × 78 in	60 in × 80 in	63 in × 79 in
	1.5 m × 2.05 m	1.5 m × 2 m	1.5 m × 2.05 m	1.6 m × 2 m
King, (Super King)	76 in × 80 in	72 in × 78 in	72 in × 80 in	71 in × 79 in
	1.95 m × 2.05 m	1.85 m × 2 m	1.85 m × 2.05 m	1.8 m × 2 m

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.

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.

In some places (including China) and historically, Single referred to a bed size that was half the width of a Double, that is, approximately the width of one pillow. In nations with better nutrition (and hence larger citizens) and greater wealth, such beds have become quite rare, making a Twin be the standard for one-person sleeping. 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. The change in terminology has been used (and perhaps promoted) by people involved in retail bed sales to be able to say to customers that a double is "only 15 inches wider than a single bed," which is sometimes a point made to encourage customers to purchase a more expensive queen-sized bed. Note that portable cots are generally the size of original single beds.

Other U.S. sizes

Twin Extra Long : 39 in × 80 in (1 m × 2.05 m)

This size is fairly popular in college dormitories.

Three Quarter : 48 in × 75 in (1.2 m × 1.9 m)

This size is considered obsolete by the major manufacturers.

Olympic Queen : 66 in × 80 in (1.7 m × 2.05 m)

California Queen : 60 in × 84 in (1.5 m × 2.15 m)

Eastern King : 76 in × 80 in (2 m × 2.05 m)

This is the same as a U.S. King.

California King : 72 in × 84 in (1.85 m × 2.15 m)

This is the standard king size on the West Coast of the United States, and is sometimes called the West Coast King or WC King.

Other UK sizes

Small Single : 30 in × 75 in (0.75 m × 1.9 m)

Super Single : 41 in × 75 in (1.05 m × 1.9 m)

Three Quarter : 48 in × 75 in (1.2 m × 1.9 m)

Other European sizes

Extra Small Single : 0.75 m × 2 m (29½ in × 78¾ in)

Small Single : 0.8 m × 2 m (31½ in × 78¾ in)

Large Single : 1 m × 2 m (39½ in × 78¾ in)

Types of bed

---

There are many varieties of bed:

• An adjustable bed is a bed that can be adjusted to a number of different positions
• An air bed uses an air-inflated mattress, sometimes connected to an electric air pump and having firmness controls.
• A bassinet is a bed specifically for newborn infants.
• A box-bed is a bed having the form of a large box with wooden roof, sides, and ends, opening in front with two sliding panels or shutters; often used in cottages in Scotland: sometimes also applied to a bed arranged so as to fold up into a box.
• A bunk is a bed used in a confined space.
• A bunk bed is two or more beds one atop the other.
• A captain's bed (also known as a chest bed or cabin bed) is a platform bed with drawers and storage compartments built in underneath.
• A cot is a small bed (called a crib in American English) specifically for babies and infants. A cot can also refer to a simple, temporary, portable bed used by armies and large organizations in times of crisis.
• A daybed is a couch that is used as a seat by day and as a bed by night.
• A futon is a traditional style of Japanese bed that is also available in a larger Western style.
• A hammock is a piece of suspended fabric.
• A Manjaa is traditional Punjabi bed made of tied ropes bordered by a wooden frame.
• A Murphy bed is a bed that can hinge into a wall or cabinet to save space.
• A pallet is a thin, lightweight mattress.
• A platform bed is a mattress resting on a solid, flat raised surface, either free-standing or part of the structure of the room.
• A sofabed is a bed that is stored inside a sofa.
• A state bed developed in Early Modern Europe from a hieratic canopy of state.
• A trundle bed or truckle bed is a bed usually stored beneath a twin bed.
• A waterbed is a bed/mattress combination where the mattress is filled with water.

References

---

1. ^*

See also

---

• Sleep
• Co-sleeping

Beds

Llit | Postel | Seng (møbel) | Bett | Cama | Lito | Lit | מיטה | Bed | ベッド | Seng | Łóżko | Cama | Кровать | Bed | Sänky | Säng | 床