A small double bed typically measures 120 cm (4 feet) wide and 190 cm (6 feet 3 inches) long. It is larger than a single bed but smaller than a standard double bed, making it a good choice for smaller rooms or for individuals who want a bit more space than a single bed but do not have room for a full double bed. It is sometimes called a "four-foot bed" or "three-quarter bed." This size offers a balance between comfort and space efficiency, suitable for solo sleepers who want extra room or couples who do not mind cozy sleeping arrangements. Here is a comparison of common bed widths for context:

• Single bed: 90 cm wide
• Small double bed: 120 cm wide
• Double bed: 135 cm wide
• King size bed: 150 cm wide

The length is usually the same (190 cm) among single, small double, and double beds, while king size beds tend to be longer at 200 cm.