Plus-size clothing is clothing proportioned specifically for people above the average clothing size. The application of the term varies from country to country, and according to which industry the person is involved in.[nb 1]
According to PLUS Model magazine; "In the fashion industry, plus size is identified as sizes 18 and over, or sizes 1X-6X and extended size as 7X and up". The article continues "Susan Barone [...] shared, 'Plus sizes are sizes 14W - 24W. Super sizes and extended sizes are used interchangeably for sizes 26W and above. Sometimes the size 26W is included in plus size'."
Such clothing has also been called outsize in Britain, a term that has been losing favor. One example of this is the renaming of "Evans Outsize" to simply "Evans", as well as losing their advertising slogan "Evans - The Outsize Shop", which also featured on their clothing labels. A related term for men's plus-size clothing is big and tall (a phrase also used as a trademark in some countries).
A relatively new alternative term for plus size (or large size) gaining consumer and editorial favor is curvy. In a euphemistic sense, curvy is regarded as less offensive to those that wear larger sized clothes. There is evidence of this term gaining media and market traction. In current media use, while curvy can appear less offensive, it appears to associate with a younger style of dressing than plus size or larger size when used as a general reference term.
Lane Bryant began trading in the early 1900s as a producer of clothing for "Expectant Mothers and Newborn"'. By the early 1920s, Lane Bryant started selling clothing under the category 'For the Stout Women', which ranged between a 38-56 inch bustline. Evans, a UK-based plus-size retailer, was founded in 1930. In the 1920s small boys clothing store, Brody’s in Oak Park Mich (now bloomfield) started the “Husky” size clothing.
The large-size fashion revolution of 1977–1998 in the US began after the Fashion Group of NYC released a study predicting the demise of the Baby Boomer Junior Market, as the Boomers were coming of age. Mary Duffy's Big Beauties was the first model agency to work with hundreds of new plus-size clothing lines and advertisers. For two decades, this plus-size category produced the largest per annum percentage increases in ready-to-wear retailing.
On February 6th, 2019, luxury e-tailer 11 Honoré, which sells designer clothing in sizes 12 to 24, opened New York Fashion Week with a fashion show focused on size inclusivity. The runway show featured looks from Christian Siriano, Prabal Gurung, Cushnie and Brandon Maxwell. Actress Laverne Cox closed the show wearing a custom dress by designer Zac Posen. 
Plus-size clothing patterns have traditionally been graded up from a smaller construction pattern. However, many retailers use statistical data collected from their own measuring projects, and from specialized Body Scan Data collection projects to modernize the fit and construction of their garments. U.S. companies Lane Bryant and Catherines teamed up over a three-year period to source data to modernize the companies' garment construction. 14,000 women were measured in what was the most extensive female sizing study in the U.S. in more than 60 years.
The Australian plus-size clothing market has been growing since at least 1994, with major department stores such as David Jones, Myer, and Target producing their own brand ranges, and an increase in the number of individual boutiques and national chain store outlets across the country. Sizing in Australia is not synchronous with the US; plus-size garments are considered to be size 16 and upward, which is the equivalent of a US size 12. A recent study conducted by IBIS world that "65.2% of the population aged 18 and over are expected to be overweight or obese in 2017-18. This is resulting in more interested and competition in the wider fashion industry resulting in more department stores that stocking plus-size clothing.
Notable Australian chain store brands for plus-size clothing include Plus Size Clothing Co, Maggie T, Autograph (formerly 1626), Free People and City Chic (formerly Big City Chic). There is also a boom in Australian designer independent plus size labels such as Camilla Jayne, Curvy Chic Sports, Hope & Harvest, 17 Sundays, Sonsee, Lowanna Australia, and Harlow.
In the UK there are more than 60 brands for plus-size women's clothing; however, only a small number of these brands are manufactured or owned by UK-based companies. High-street stores such as Yours Clothing, Elvi, Evans, Ann Harvey, Dea London and BeigePlus sell only plus-sized garments, while many other brands and department stores carry extended sizes in their shelves, such as Debenhams, River Island, ASOS, Fenwicks and New Look. More recently, stores specifically supplying plus-size sportswear, fitness wear and bras have opened such as State of Mind, Charlotte Jackson, Eve Activewear, and We Fit In. Notable online sites also include ASOS.com, Dearcurves.com and Style908. Anna Scholz has been creating clothes for the high end market since 1995. Another notable online retailer which specialises in manufacturing and retailing plus-size clothing is Love Fashion. Opened in 1985 and based in the Midlands, they are global suppliers of all plus-size women's apparel.
|Name||Distribution channels||Headquarters In UK||Year Established||Multi brand||UK Size range||Founder|
|Ann Harvey||Mult channel||Yes||Unknown||No||16 to 32||Unknown|
|Anna Scholz||Online||Yes||1996||No||18 to 26||Anna Scholz|
|BeigePlus||High Street, Online||Yes||1970||Yes||16 to 28||Leanda Walters|
|Charlotte Jackson||Online||No||2009||Yes||16 to 24||Helen Crossland|
|Dea London||Online||Yes||Unknown||No||16 to 26||Jelena Fehmi|
|Dearcurves||Online||Yes||2013||No||14 to 26||Ojoma Idegwu|
|Debenhams||Mult channel||Yes||1778||Yes||16 to 26||William Clark|
|Elvi||High Street, Online||Yes||1940||No||14 to 26||Elin Vissor|
|Evans||High Street, Online||Yes||1930||No||14 to 32||Jack Green|
|Fenwicks||Mult channel||Yes||1882||Yes||Unknown||John James Fenwick|
|New Look||Mult channel||Yes||1969||Yes||18 to 28||Tom Singh|
|River Island||Mult channel||Yes||1948||Yes||18 to 24||Bernard Lewis|
|YoursClothing||Mult channel||Yes||1990||Yes||18 to 24||AK Retail|
Specialist plus-size brands (found in independent plus-size shops) known to be active in the UK (2010) include: Hebbeding (the Netherlands), Dearcurves(UK), Escaladya (Germany), Martine Samoun (Belgium), Marina Rinaldi (Italy), Persona (Italy), Elena Grunert (Germany), Elena Miro (Italy), Verpass (Germany), Chalou (Germany), Kirsten Krog (Denmark), Wille (Germany), Jomhoy (Spain), Yoek (Netherlands), Be The Queen (France), Alain Weiz (France), Tummy Tuck Not Your Daughters Jeans NYDJ (USA), Anathea by Didier Parakian (France), Fred Sabatier (France), Tia (Denmark), Rofa (Germany), Jorli (Denmark), NP (Finland), OpenEnd (Germany), A Big Attitude (USA), Terry Precision Cycling (USA), and Carmakoma (Denmark).
In November 2013, the Debenhams department store chain indicated that it plans to add Size 16 plus-size mannequins in all 170 UK stores.
Walmart also offers a limited but inexpensive plus-size apparel line. The department stores J. C. Penney, Kohl's and Macy's also offer plus-size apparel. Torrid (Hot Topic) is a retailer geared toward plus-size young adults. International online retailers, such as Simply Be (N Brown) from the UK have started marketing in the United States. Part & Parcel, a social commerce company focused exclusively on clothing for plus-size women, launched in May 2019.
On the men's side, Destination XL Group, Inc. is a major specialty retailer of men's big and tall apparel, with over 300 retail stores throughout the United States, Canada and London, England.
The purpose of the study is to determine the current average clothing size of adult American women. Secondary data of average body measurements from the most recently published National Health and Nutritional Examination Surveys were compared to ASTM International industry clothing size standards. 
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While Evans, a store that started life all the way back in 1930 as Evans Outsize
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- Christel, D. A., & Dunn, S. C. (2017). Average American women’s clothing size: comparing National Health and Nutritional Examination Surveys (1988–2010) to ASTM International Misses & Women’s Plus Size clothing. International Journal of Fashion Design, Technology & Education, 10(2), 129–136. https://doi-org