What size to get: the method that avoids returns
It's the number one reason clothes bought online get returned, and the only variable you can check before you pay: size. Three minutes with a tape measure decide the rest.
The problem isn't that you don't know your size. The problem is that a size S, M, or L isn't a unit of measurement: it's a label set by a brand, and two brands can show several centimeters of difference on the same label. "I'm an M" tells you about what you've already worn, not about what you're looking at.
This guide doesn't give a conversion chart. It gives a method: what to measure, how to measure it, how to decide. For cut and how to put together an outfit, the manga clothing guide takes over from here.
Why a size S, M, or L doesn't mean anything
No standard requires a brand to match a letter to precise centimeters. The size chart is a business decision: target market, era, intended fit on the piece.
This holds even within a single brand. A jersey is cut loose by design, a straight-cut t-shirt isn't: their respective Ms aren't the same width, and that's intentional. A label places a piece within a range, it says nothing about the fit.
Hence the only rule that holds: compare centimeters to centimeters. The rest is guesswork, and guesswork fills return boxes.
The reference-garment method
Take a piece of clothing you own that fits well, measure it flat, and compare it to the product page. That's the whole method, and you only do it once: the numbers you get will serve every future order.
1. Choose your reference garment. Not the garment that just "fits," the one whose drape you want to reproduce. Many people have worn a cut for years that they never actually chose. Stay within the same category, a t-shirt for a t-shirt, a hoodie for a hoodie.
2. Lay it flat. On a table, zipped up if it has a zip, sleeves spread out. Smooth out the creases by hand without pulling: a knit that gets stretched during measuring will be off by several centimeters.
3. Measure the width. From one armhole seam to the other, in a straight line, tape laid flat. Don't follow the curve of the fabric: it's a width, not an outline.
4. Measure the total length. From the highest point of the collar down to the hem. Write both numbers somewhere you'll find them again: it's your personal template.
The trap when comparing. A product page lists either a flat width or a chest circumference. Flat width equals half the circumference: if the listed number is double yours, you're not comparing the same thing. Read the column heading before drawing a conclusion.
Why you measure flat, never on yourself
Measuring on yourself measures your body. Measuring flat measures a garment. A product page describes a garment: so you need to compare it to a garment.
Measuring on the body stacks up three errors: the tape follows the curves instead of staying straight, tension varies by hand, and posture changes the result from one try to the next. Above all, it leaves one whole unknown: the ease the brand adds around the body. The reference garment already contains that.
The exception: some product pages give body measurements, along the lines of "fits a chest of such-and-such." There, it really is your body you need to measure. It all comes down to the wording.
What to measure depending on the piece
| Item | On the reference garment, flat | What it decides |
|---|---|---|
| T-shirt, jersey | Width from armhole to armhole, length from collar to hem | The drape of the shoulder |
| Hoodie, jacket | The same two, plus sleeve length | Room for a layer underneath |
| Pants, shorts | Waist width to double, inseam to hem | The break over the shoe |
| Cap | Nothing, if the closure is adjustable | The adjustment happens at the back of the neck |
| Watch | Wrist circumference, on yourself, with a tape measure | Actual comfort |
Pants need one extra bit of precision: measure the waistband from one side seam to the other, then double the number. On an elastic waistband, measure at rest, without stretching. The inseam is taken along the inner seam, down to the bottom of the leg.
The watch is the only piece measured on yourself. The method and how to resize the strap are in the Naruto watch buying guide.
Loose cuts: "size up" isn't a rule
It depends on the piece, because the looseness is sometimes already built into the cut. Applying the same reflex to both cases gets it wrong half the time.
The jersey is cut loose by design: low armhole, roomy body, shoulder deliberately dropped. Sizing up adds looseness to looseness and tips it into baggy, shoulder seam halfway down the arm, no more silhouette. Details are in the article about the jersey, and the collection has 33 jerseys, from 30,99 to $59.99.
A hoodie, on the other hand, forgives sizing up. It's a layering piece: the volume serves a purpose, there's room for a t-shirt underneath, and the ribbed trim holds the extra width in place instead of letting it hang loose. See the hoodie, sweatshirt, and sweater comparison and the 17 sweatshirts, from 37,99 to $89.99.
What replaces the rule: the word "oversized" describes an intention, not a dimension. Your reference garment, on the other hand, already contains the volume you like to wear.
So-called "Asian sizing": what it actually means
It means a size chart was built for a different reference market, and that under the same label, it's often narrower than a European chart. The phenomenon is real and explains a good share of unpleasant surprises.
"Asian sizing" isn't a certified label, though: it's shorthand used by sellers to flag a tighter chart. No authority defines it, and two product pages carrying this note can offer two different charts.
That's why you won't find a numbered conversion table here. You run into them everywhere, along the lines of "Asian M equals European S." The problem isn't that they're wrong, it's that they don't apply to any specific brand: the gap varies by brand and by piece.
Reliable conversion goes through centimeters. As soon as the product page gives a flat width and a length, where the chart comes from no longer matters. A number compares to a number.
Between two sizes: how to decide
The question isn't "which is my size" but "which flaw can I tolerate least on this piece."
- A top that's already loose, a jersey or oversized t-shirt: the smaller one. The looseness is already in the cut.
- A hoodie, a jacket, a layering piece: the larger one. The volume serves a purpose.
- Elastic-waist pants: the smaller one. The elastic makes up for width, never for length.
- Fixed-waist pants: the larger one. A belt fixes a loose waist, a hem can be altered.
The useful shortcut: on a top, when the two measurements don't land on the same size, prioritize the width, which decides the drape at the shoulder. On pants, prioritize the waist: the length can be altered.
When the product page gives no dimensions at all
Treat the absence of information as information. A page that goes on at length about a universe but stays silent on centimeters is asking you to pay for a gamble.
Ask before you order. A precise question gets a precise answer: "what's the flat width from armhole to armhole and the total length on size M?" gets answered in two numbers by someone with the piece in hand. A vague answer teaches you something useful before you've spent a cent. The same question applies to our own product pages.
A measurement taken in three minutes avoids a package being sent back. It doesn't excuse you from reading the terms: check the current return policy before confirming your order.
Frequently asked questions
What if none of the clothes I own fit well?
Take the closest one and adjust in centimeters. Measure it flat, then note the difference: "I'd need two more centimeters in width." Apply that adjustment to the product page. An imperfect reference garment whose flaw you know is still more reliable than a size guessed from memory.
Should you always size up on "Asian sizing"?
No, and that reflex produces the most baggy clothes. The gap often exists, but it's neither constant nor announced. If the page gives dimensions, compare them to your reference garment. If not, ask for them.
Could the garment shrink in the wash?
A cotton knit can tighten up slightly on the first hot wash, especially in the tumble dryer. Cold washing and air drying neutralize the issue. Don't size up "just in case": that would mean compensating for a number nobody gave you.
How do you choose the size of a gift without knowing their measurements?
Sidestep the question. An adjustable cap, a watch whose strap can be resized afterward, or an accessory all avoid the problem. That's what makes them the safest bets to give.
My two measurements fall into two different sizes, which do I pick?
On a top, follow the width: the shoulder and armhole decide the drape, a slightly different length is noticed far less. On pants, follow the waist, since the inseam is the only measurement a tailor can adjust cleanly.
Key takeaways
A size is a label, a measurement is a fact. Take a garment you love wearing, lay it flat, note two numbers, keep them. Every product page becomes readable, and hesitating between two sizes gets settled by the piece and the effect you're after.
Three minutes with a tape measure, once. It's the best effort-to-result ratio in all of online shopping.
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