Joybuy Insights

How to buy jeans online without getting it wrong: choose the right fit, size and colour

Buying jeans seems simple – until the pair arrives and doesn’t fit as expected. A waistband that digs in, a length that’s off, or denim that loses its shape after a few washes can turn a cheap purchase into an expensive mistake. Women’s jeans and men’s jeans differ not only in sizing, but also in fit, leg room and fabric.

So don’t just focus on colour or brand name. Look at the size guide, fabric composition, rise, leg shape and care instructions. With that information, you can compare Levi’s jeans, Only jeans and other models more fairly.

Three common pitfalls when buying jeans online

1. Relying only on the label size

A size 27 or 32 isn’t the same across every brand. Even within the same brand, a 501 jeans can fit differently to a 505 jeans. Always check the stated waist, hip and inside leg measurements. For men’s jeans, you’ll often see a combination like 32/34: the first number refers to the waist and the second to the inside leg length.

2. Confusing stretch with a roomier fit

A stretch jeans can feel more flexible thanks to elastane or a similar fibre, but that doesn’t automatically mean the jeans are bigger. A 100% cotton jeans generally feels firmer and less stretchy. If freedom of movement matters to you, it’s worth checking both the fabric composition and the fit description.

3. Choosing a colour without considering the occasion

Blue jeans are versatile for everyday wear. Dark blue jeans tend to pair more easily with a shirt, blouse or smart jumper. Black jeans offer a sharper contrast, but can gradually fade with washing. As well as the main photo, look at the product information about the wash, because terms like “washed” or “distressed” indicate a deliberately aged look.

What to check before you order

Fit: straight leg, skinny or another style

  • Straight leg jeans: run relatively straight from the thigh down to the ankle. This is a practical choice if you want a classic, non-slimline silhouette.
  • Skinny jeans: fit closely around the hips, thighs and calves. With this style, double-check whether the fabric contains elastane.
  • Regular fit: generally offers more room in the seat and thighs. According to the product description, the Levi’s 505 for men is regular through the thigh and has a straight leg.
  • Shaping styles: some product descriptions mention a shaping panel or extra support around the hips and thighs. Treat this as a design feature of the garment, not a medical or health claim.

Fabric and stretch

Check the percentage of cotton, polyester, lyocell and elastane. The Levi’s 501 models in this selection are described as 100% cotton and have no stretch. That suits anyone looking for an authentic, sturdy denim feel. The Levi’s 314 is made from 80% cotton, 19% polyester and 1% LYCRA elastane, according to the product description. The Levi’s 514 for men contains 70% cotton, 28% TENCEL Lyocell and 2% elastane.

A higher elastane content can offer more flexibility, but on its own it doesn’t tell you anything about durability. Also check the washing instructions. Many models recommend washing cold, washing inside out and washing less often. Always follow the care label inside the jeans.

Size and length

Measure a well-fitting pair of jeans flat and compare the waist and inside leg with the product size chart. For women’s jeans in size 27, some Levi’s 501 size charts give a waist of 71.8 cm and a hip measurement of 94 cm. These are product specifications; always check the chart for the specific model you’re looking at.

For men’s jeans in size 32, the length isn’t automatically the same. A model like the Levi’s 505 is offered here as 32/34. The product information also notes that this model can run slightly small and advises considering a size up for a looser fit. Use that information as a starting point, but also compare it with your own jeans.

Our recommendations by buyer profile

Best for: Budget-conscious beginners
Only Jeans Medium Blue Denim size 30

Only Jeans Medium Blue Denim size 30

Why it fits this profile: An accessible blue jeans for anyone looking for a simple basic online without immediately choosing a specific premium model.

How this product avoids the pitfall

The colour and size are clearly stated in the product name. Before ordering, do check the current size information, as a detailed composition is not included in the description provided.

Key benefit & highlights

Medium blue denim; size 30; suitable as an everyday basic for different outfits.

Best for: Shoppers seeking top quality
Levi's Women's Jeans Blue 501 Collection 27/30

LEVI'S Women's Jeans Blue 501 Collection 27/30

Why it fits this profile: For anyone who values a recognisable straight-leg style, a classic five-pocket design and 100% cotton denim.

How this product avoids the pitfall

The product information explicitly states 100% cotton and a straight-leg fit. This makes the choice less dependent on general marketing terms.

Key benefit & highlights

100% cotton; straight leg; button fly; classic five pockets; size chart with waist and hip measurements.

Best for: Specific use & heavy wearers
LEVI'S Men's Jeans Med Indigo 514 Collection 31/32

LEVI'S Men's Jeans Med Indigo - Flat Finish 514 Collection 31/32

Why it fits this profile: A men’s model for everyday movement, with a straight leg and a fabric blend that includes 2% elastane.

How this product avoids the pitfall

The combination of fabric percentages and style information makes it clear that this is not a stiff, 100% cotton jeans. That helps when choosing based on freedom of movement.

Key benefit & highlights

70% cotton; 28% TENCEL Lyocell; 2% elastane; straight fit; zip fly and five-pocket design.

Best for: Dark, versatile outfits
LEVI'S Women's Jeans Dark Blue 501 Collection 29/30

LEVI'S Women's Jeans Dark Blue 501 Collection 29/30

Why it fits this profile: The dark blue wash pairs easily with light tops, knitwear and smart shoes.

How this product avoids the pitfall

The product information lists the dark colour, straight-leg shape and 100% cotton composition separately. This means you can assess colour and fit independently.

Key benefit & highlights

Dark Blue; 100% cotton; straight leg; button fly; size chart for waist and hip.

Looking for more options?

We’ve put together a full, up-to-date list of products that fully meet these strict selection criteria and current European safety regulations.

Frequently asked questions about buying jeans

How do I work out my jeans size online?

Measure a well-fitting pair of trousers and compare the waist and inside leg with the chart on the product page. Note the difference between women’s sizes and men’s size combinations like 32/34. A brand’s own size chart takes priority over a general conversion table.

How often should I wash my jeans?

Follow the care label. Several product descriptions advise washing cold, washing inside out and not washing the jeans after every wear. Washing less often can help preserve colour and fabric, but stains and hygiene should still guide your decision.

What’s the difference between a 501 jeans and a 505 jeans?

In this selection, the 501 is described as a women’s model with a straight-leg fit, 100% cotton and a button fly. The 505 is a men’s model with a regular fit, straight leg and zip fly. Always check the specific size and style information, because the number alone doesn’t determine how the jeans will fit you.