What size are you at this store?

There is no standard, whatever the tables imply

Search for a size converter and you will find a hundred pages asserting that EU 38 is UK 10 is US 6. The merchants selling the clothes do not agree with that, or with each other. A retailer's chart is not an approximation of some underlying truth. It is the specification their stock was cut to, which makes it the only chart that matters for their stock.

So this tool asks which store before it converts anything, and shows you the chart it used and the date we read it. Where a merchant has not published a chart, it says that too, in the source line under the table, rather than quietly filling the gap with somebody else's numbers.

Two centimetres, inside one store

Trendyol makes the argument better than we can. It publishes two separate trouser tables. One covers Milla by Trendyol, Modagram and Nottis, its own labels, and puts a TR 38 at a 73 cm waist. The other covers every other brand it stocks, and puts a TR 38 at 71 cm.

Same site, same number on the label, two centimetres apart. Nobody is being dishonest here; the own-brand patterns were simply drafted to a different block. But if you buy a 38 from one and a 38 from the other on the same order, one of them is going to feel wrong, and you will blame yourself rather than the number.

This is the whole reason the tool asks for the store first, and the reason its limitations section says a store's house chart does not govern every label it stocks. When the product page carries its own chart, that one wins over everything on this page.

Trendyol says so itself

You do not have to take our word for any of this. Trendyol runs its own dress size calculator, and the small print under it states that a size suggestion can vary by brand, by pattern and by fabric type, and that it is not a definitive size recommendation.

That is the retailer telling you its own labels are approximate. The same page sets out two rules worth stealing. When your measurements land in different size bands, take the larger one for comfort. And a slim cut demands that your measurements match the chart exactly, while a draped or oversized one has room to be wrong in.

It also defines where to put the tape, which is the part most guides get vague about: chest at the widest point with the tape horizontal front and back, waist at the narrowest point of the torso along the natural crease, hip at the widest point of the seat.

SHEIN does not have a size chart

This surprises people, so it is worth stating flatly. There is no store-wide SHEIN chart to convert against. SHEIN's own help page tells you to tap the Size Guide button on the individual product, because its listings come from a very large number of separate manufacturers and each one grades its own patterns. A SHEIN M in one dress and a SHEIN M in another are not the same garment measurement, and no table anywhere on the internet can make them so.

Every page you have seen titled "SHEIN size chart" is either a generic international table with SHEIN's name on it, or somebody's average of a handful of listings. We are not going to publish a third one. What we can tell you is the shape of the problem and how to work around it.

SHEIN runs small, roughly one size, and closer to two on anything fitted. Much of its stock is cut to Asian sizing, where the grading is tighter at every step. For tops and dresses the bust measurement decides; for jeans and skirts it is waist and hip. If you land between two rows on a listing, take the larger one, because SHEIN's increments are narrow enough that the smaller row will be tight rather than snug. And SHEIN Curve uses a separate chart from the regular line, so a size read off one does not transfer to the other.

The practical workflow is short. Measure yourself once. Open the listing, tap Size Guide, switch it to centimetres, and match your three numbers against that specific item. Ignore the letter entirely. It takes about fifteen seconds per order and it is the only method that works on a marketplace with thousands of suppliers behind it.

Take three measurements once

Almost everyone who returns clothes for size never measured themselves. It takes a minute with a soft tape, and after that every chart on every site becomes readable.

Bust: around the fullest part of the chest, tape level with the floor all the way round, snug but not pulled tight. Waist: the narrowest part of your torso, usually a couple of centimetres above the navel. If you cannot find it, bend sideways and the crease is your natural waist. Hips: the fullest part, roughly 20 to 23 cm below the waist, and remember to include the seat rather than measuring across the hip bones.

Stand the way you normally stand. Do not hold your breath, do not pull your stomach in, and take the measurements over underwear rather than over clothes. A tape pulled two centimetres tight puts you a full size down on most charts, which is how people end up with a wardrobe they cannot sit down in.

Write the three numbers in your phone. They change slowly, if at all, and you will use them for years.

Read the row in centimetres, not the letter

Once you have your numbers, the size label stops being the important part of the row. Trendyol lists a women's 38 as an 89 cm bust and a 73 cm waist. If your bust is 89, you are a 38 there, whatever you wear at home. If your bust is 93 you are a 40, even if you have thought of yourself as a 38 for a decade.

When the bust and waist land on different rows, which is common, pick the row that matches the part of the garment that cannot be adjusted. A dress or a fitted top goes by bust. Trousers and skirts go by waist and hip. A loose shirt will forgive either. Choosing by the larger of the two measurements is the safer default, since taking something in at a tailor costs less than not being able to close it.

Shoes are the easier case, if you use the right column

Shoe charts are more trustworthy than clothing charts, for a simple reason: they publish foot length in centimetres, and a foot is a foot. Trendyol's women's table puts a 38 at 24.5 cm and a 39 at 25 cm. Measure heel to the tip of your longest toe, standing, with your weight on the foot, and you can read the number straight off.

Do it late in the day. Feet swell over the course of a day and can gain half a centimetre, which is a whole size in a chart where the steps are around half a centimetre wide. Measure both feet and go by the larger one, because most people have a noticeable difference and the smaller foot will tolerate a roomy shoe far better than the larger foot will tolerate a tight one.

Also note that the longest toe is not always the big toe. If yours is the second one, measure to that.

Why this page refuses to guess

If the size you wear is not a row on the merchant's chart, this page says so instead of placing you between two rows. Interpolation looks helpful and reads as precision, but what it actually produces is a number the merchant never published, and a parcel going back at your expense.

The same logic applies to the source line under each table. Where you see a note saying the rows are reference sizing rather than the merchant's own chart, treat the conversion as an orientation and open the product page before you order. That note is not boilerplate. It is the difference between a chart we read from the shop and a chart nobody at the shop has ever seen.

What no chart can tell you

A chart maps sizes to bodies. It says nothing about how a garment was cut, and cut is often the thing that decides whether something fits.

Fabric is the other half of it. A cotton jersey with elastane gives several centimetres and will feel fine a size down. A rigid woven cotton or a lined dress gives nothing, and a two-centimetre miss is the difference between wearing it and returning it. Structured items, blazers and anything with a zip at the side, are the least forgiving of all.

Product photos and the review section are worth more than any conversion here for that question. Reviews that mention height and usual size are the closest thing to a fitting room you get online.

Before you order

Open the merchant's own size guide on the product page. It is the newer document, it is item-specific, and it overrides everything above. Match on centimetres where the page gives you the option. And check the return terms before you commit rather than after, because on a cross-border order the return is the expensive part, and knowing what it costs changes whether it is worth ordering two sizes to keep one.