
An Italian size 48 does not correspond to a French 48. Some brands even convert a French 38 into an Italian 42, without any apparent logic. The size conversion charts vary from one site to another, and official guides show discrepancies of up to two sizes for the same measurement.
In this context, choosing the right size online often feels like a lottery. Differences in cuts, variations between manufacturers, and the lack of standardization exacerbate the confusion. The result: purchasing errors and returns are on the rise.
Further reading : How to use an Illicado card for your online purchases at Leroy Merlin
Why do Italian and French sizes confuse us so much?
From the first glance at the label, things get complicated. France, Italy, and their neighbors adhere to distinct systems that rarely share the same benchmarks. The size conversions displayed from one store to another lack logic and even perplex informed customers. It seems that each brand plays by its own rules.
On the product page, the sequence of numbers does nothing to help: a French 40 becomes an Italian 44 without any apparent justification, and for shoes, the French 38 does not always correspond to a direct equivalent. The conversion charts are abundant, sometimes contradictory, and it is not uncommon to come across the mention of Mexican size, which is even harder to grasp when making international purchases.
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In women’s fashion, the gap widens even further: at a constant size, the bust or hip measurements vary by country. A dress labeled 38 may fit snugly in France, be loose in Italy, or surprise you in the UK or the USA. The online customer then faces a very real challenge: that of deciphering.
| Country | Label Size | Bust Measurement (cm) |
|---|---|---|
| France | 38 | 86 |
| Italy | 42 | 86 |
This patchwork of conversions turns the experience into an obstacle course. No one can navigate it without extreme vigilance, as classic benchmarks fall apart with each garment.

Choosing the right size online: simple tips to avoid unpleasant surprises
Today, it’s impossible to shop without taking your measurements. A tape measure around the bust, a notebook to record each data point: bust, waist, hip measurements, or foot length must be noted meticulously. Some sites use centimeters, others inches: it’s best to keep everything handy.
Most e-stores offer precise size guides or charts. Taking the time to compare your measurements with these references reduces the risk of returns. Using the model’s indications (for example, 1.75 m, size 36) also gives a better idea of the actual fit, especially when the cut affects the feel.
To navigate these pitfalls, let’s adopt some simple reflexes:
- For shoes, measure the length of your foot from heel to toe before checking the site’s specific chart.
- For children’s or baby clothes, prioritize the height expressed in centimeters on the baby size label, which is much more reliable than age.
Some references also include lesser-known annotations, like the famous Mexican size mentioned earlier: here too, it’s essential to scrutinize the equivalence charts at the slightest doubt and leave nothing to chance, especially on foreign platforms where codes fluctuate from one brand to another.
You can no longer shop online without vigilance or method. Those who arm themselves with patience and a tape measure can tame the jungle of sizes. Finding the right fit transforms this challenge into a victory over chance. The next time you face two improbable numbers, remember: the key lies in your own measurement, not on a changing label.