To identify (a) an estimate for the number of variables which determine good fitting straight jeans in the US and (b) give the variance in adults body sizes in the United States and an estimate the number of sizes required to fit them.
US Apparel Sizing
In the US, "women’s apparel sizing is arbitrary, non-determinate, and differs among factors such as style, age or size classification, and brand. This lack of uniformity presents challenges when discussing and classifying female populations and individuals by clothing size and not by body measurements."
ASTM-I is recognized as a leader in the development and delivery of voluntary consensus standards and provides clothing size standards for females, however, standards are driven by the private sector in the US. Labels and clothing sizes are governed by individual apparel companies in the US, with no legal regulation.
"The National Health and Nutrition Examination Survey (NHANES) and CDC anthropometric data contribute to ASTM-I clothing size suggestions." The American National Standards Institute (ANSI) also coordinates the activities of the standards development community in the US.
"Many women’s apparel manufacturers base their current size labeling on one of two resources: ASTM-I’s standard tables of body measurements, or the US voluntary size standards, which were published in 1958 and based on data collected in the 1930s."
Clothing sizes have become even less reliable over the years as the US population has become more diverse in body shape and size.
"The 2004 publication of the SizeUSA national survey claims to be an excellent database for size comparison, but it is not available to the public."
For this hour, we tried identifying as much of the requested information as possible. We were able to find some early insights on US apparel sizing.
We found that most women’s apparel manufacturers base their current size labeling on ASTM-I’s standard tables, however, this is not publicly available but can be purchased for a fee. We also found that the SizeUSA 2004 survey is another database used for size comparison, but it is also not available to the public.
We also found that the National Health and Nutrition Examination Survey (NHANES) and CDC anthropometric data contribute to ASTM-I clothing size suggestions. A link to their most recent data for US body measurements can be accessed here.
Based on the information, determining good fitting straight jeans and giving an estimate of the number of sizes of straight style jeans which would be required to fit all body types in the United States appears difficult since women’s apparel sizing in the US appears arbitrary.
In the course of our research, we also came across some information on merchandising classifications in the US clothing industry and insights on what consumers think about clothing fit in the US, which might also be of interest.
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