Why is it so difficult to find the perfect pair of jeans? An explainer

Jeans are one of the world's most widely worn garments. They are practical, familiar and available at almost every price point, from high-street basics to designer fashion.

But finding a pair that fits well, feels comfortable and suits the wearer can be surprisingly difficult.

That matters beyond the frustration of shopping for clothes. Poor fit can encourage people to buy several pairs in search of one that works, while cheap, low-quality jeans may not last long. At the same time, denim production has a significant environmental footprint.

The history of jeans makes this particularly striking. They were originally designed as durable workwear. Today, their popularity and low-cost production can encourage a much shorter lifespan.

How did jeans become so popular?

Denim has been produced since at least the 16th century, but jeans became strongly associated with American culture and durable workwear during the California Gold Rush of the 1850s.

Levi Strauss, a Bavarian immigrant who had moved to California, ran a dry goods business supplying miners. One of his customers, tailor Jacob Davis, developed a way of reinforcing the stress points of work trousers with metal rivets.

Strauss and Davis patented the technique, helping establish the business that became Levi Strauss & Co.

The rivets made the trousers more durable, which was particularly useful for people doing physically demanding work. Jeans subsequently became associated with miners, labourers and cowboys.

Their meaning changed again in the 1950s. Actors including Marlon Brando and James Dean wore jeans in films portraying young outsiders and nonconformists. Denim became associated with rebellion and youth culture.

Over time, that association broadened. Jeans moved from workwear and youth fashion into everyday clothing worn across generations, cultures and social groups.

Why is the perfect pair so difficult to find?

There is no single definition of a perfect pair of jeans.

For the wearer, jeans have to satisfy several requirements at once. They need to fit the body, feel comfortable and work with the way the person wants to look and present themselves.

Fit itself is complicated. Bodies differ in shape and proportion, while denim varies in its cut, fabric composition, stretch, rise and sizing between brands.

Research into consumers' experiences of buying denim suggests that difficulties with fit affect people of different genders. Some consumers may respond by trying multiple styles and brands, while others may choose cheaper alternatives when they do not want to pay more for a garment whose fit is uncertain.

This can create a problem beyond the individual shopping experience: repeated purchases of poorly fitting or short-lived clothing can contribute to overconsumption.

What does denim have to do with sustainability?

The environmental impact of jeans begins before they reach the shop.

Cotton is commonly the main fibre in denim, and growing cotton can require substantial quantities of water. One widely cited estimate puts the water footprint of a pair of jeans at around 7,500 litres, although estimates vary depending on how the footprint is calculated and which stages of production are included.

A pair of jeans can also involve materials and components sourced from different parts of the world. Cotton, dyes, thread, buttons and other components may pass through multiple stages of production before the finished garment reaches consumers.

The construction of jeans can create another challenge at the end of their lives. Some jeans contain blends of fibres or other materials, making recycling more difficult than it would be for a garment made from a single fibre.

The environmental impact therefore extends across the life of the garment: from growing and processing its raw materials to manufacturing, transport, use and disposal.

Can cheap jeans make the problem worse?

Price can influence how consumers think about the lifespan of clothing.

When jeans are inexpensive, replacing an uncomfortable or poorly fitting pair may seem easier than repairing or altering it. Low prices can also make it easier to buy several pairs in search of the right fit.

Research into consumers' experiences of denim suggests that price is particularly relevant to decisions about what to buy. Some men interviewed in research by the author reported being reluctant to pay more for established brands and instead choosing cheaper high-street alternatives.

Lower prices do not necessarily mean that a garment will be poor quality, but inexpensive clothing can be produced under conditions where durability is not the primary consideration. If a garment wears out quickly or does not fit well, replacing it can increase the amount of clothing being consumed.

This creates a tension between the original purpose of jeans and their place in modern fashion. A garment developed for durability has become part of a system in which clothing can be bought, discarded and replaced relatively quickly.

Could better fit make denim more sustainable?

Improving the fit of jeans could help address part of this problem.

For consumers, a well-fitting and durable pair is more likely to become a long-term part of a wardrobe. For retailers, however, offering many different cuts, sizes and proportions can increase production costs and make the shopping process more complicated.

Technology could offer one possible solution.

Virtual fitting systems are being developed using technologies such as 3D body-shape recognition. In principle, these systems could help shoppers identify garments that are more likely to fit before buying them online.

The technology is still developing, however, and virtual fitting cannot reproduce every aspect of trying on jeans in person. A system may be able to predict how a garment fits the body without being able to replicate how its fabric feels or moves.

What would a more sustainable pair of jeans look like?

There is no single solution to the environmental impact of denim.

Longer-lasting garments, better fit, more considered purchasing and improved approaches to manufacturing and recycling could all play a role.

The challenge is partly about changing the way jeans are designed and sold. If garments are made to fit more people accurately and last longer, consumers may have less reason to replace them.

It is also about how we think about the clothes we already own. Jeans were originally valued because they were durable enough to withstand demanding work. That durability remains one of their most useful qualities.

The search for the perfect pair of jeans is therefore more than a question of fashion or personal style. It raises a wider question about how clothing can be designed to fit people's bodies, their lives and a more sustainable approach to consumption.