typical bed sizes from the National Bed Federation, which is the trade association for the majority of British and Irish bed manufacturers and their suppliers. Most NBF manufacturers use designs dimensioned in feet and inches with the metric indicators not being exact equivalents. There can legally be a tolerance of up to ± between the quoted measurements and the size of the mattress itself. . Some UK retailers may have a "queen" size which refers to one of the above standard sizes, but there is inconsistency around which size specifically, with both the small double and super king being prevalent. As well as customary UK sizes, some common European sizes can be found in the UK from imports and IKEA. The typical length of an IKEA and other European mattresses is , whereas UK lengths vary depending on the width of the mattress, being usually either . In 2015, IKEA started offering beds and mattresses in customary UK sizes alongside their standard European sizes. Turkey In Turkey, single size beds are usually . Long single size Large single size There is also an intermediate size used for one and a half people in Turkey. The most common sizes for double beds are: Small double size Young size Double size Double size Double Large size Double XL size North America The sizes of mattresses use non-numeric labels such as a "king" or "full", but are defined in inches. Historically most beds were "twins" or "doubles" but in the mid-1940s larger mattresses were introduced by manufacturers. These were later standardized as "queen" and "king", and first made a significant impact on the market in the 1950s and 60s. Standard mattress depth ranges from the "standard" size of to "high contour" of up to . Below are the standard ISPA widths and heights in the United States and Canada. While the dimensions are specified to the half-inch below, the actual dimension used by manufacturers or various websites may be half an inch larger or smaller. Less common sizes include: There are also a number of specialty sizes for specific use cases: Bedding in the United States must state the type of bed it is intended for, in addition to the dimensions in both inches and centimeters. Oceania Australia The following bed sizes are available in Australia. New Zealand The following bed sizes are available in New Zealand. Africa South Africa In South Africa,