Louis Vuitton Jacket Sizing: What 'Based on Size 48' Actually Measures

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Louis Vuitton prints a jacket's measurements against a single size, labelled based on size 48, so a garment sold in nine sizes from 44 to 60 arrives with numbers for one of them. Across the men's outerwear pages checked for this guide, the same label covers back lengths from 62 cm to 125 cm, shoulders from 49 cm to 67 cm, and models whose own chests are 82 cm to 92 cm. The men's tops chart prints a 46.5 cm shoulder and a 98.5 cm chest for size 48 — the body the size is cut for, not the jacket that arrives.

Louis Vuitton prints the measurements of a jacket against one size only: 48. Across the men’s outerwear pages checked for this guide, that single label covers back lengths from 62 cm to 125 cm, shoulder widths from 49 cm to 67 cm, and models whose own chest measurements run from 82 cm to 92 cm. The house’s own men’s tops chart prints a 46.5 cm shoulder for the same size.

Louis Vuitton’s product pages carry a block headed Size and Fit that measures the garment rather than the wearer: shoulder to shoulder, chest or waist, outside and inside sleeve lengths, and garment length. Every row in that block is tied to one size, printed as based on size 48, so a jacket offered in nine sizes from 44 to 60 arrives with numbers for just one of them. The men’s tops chart is a separate document. It runs from XXS at EU 44 to XXXL at EU 58 and prints body references instead of garment measurements: 46.5 cm at the shoulder, 98.5 cm at the chest and 99 cm at the hip against size 48. Read both and the same size is described twice, in two different ways, with the distance between them running from 2.5 cm at the shoulder to more than twenty centimetres at the waist.

Everything below is taken from pages that print figures: the outerwear product pages and the measurements they carry, the men’s tops chart and the measuring instructions printed above it, and two resale listings where somebody put a tape against a jacket. All of them were checked on 2 October 2026, and none of them is a statement about a particular garment.

The four numbers Louis Vuitton prints about a jacket, and the one size they cover

Under Size and Fit, a Louis Vuitton jacket page answers four questions about the finished garment. Shoulder to shoulder width is measured straight across the back. Chest size is given as a circumference for the pieces cut straight through the body, and as waist for the pieces that are shaped. Sleeve length is printed twice on several jackets — once outside, once inside — because the outer measurement follows the seam and the inner one follows the lining. Garment length is given as back length, from the collar seam to the hem.

All four figures are attached to one size. The line reads based on size 48 and then lists the numbers, so the block is a description of what the 48 measures, not a ladder. Sizes 44, 46, 50, 52, 54, 56, 58 and 60 are sold on the same page with no published measurements of their own.

The fit word sits beside those numbers and is the only other size-related fact on the page. Louis Vuitton labels its own outerwear regular fit, slightly loose fit or oversize fit, and the same house uses all three across jackets that share the number 48.

What the house’s own men’s tops chart says size 48 is

The men’s tops chart is the document most buyers find first, and it is built on a completely different idea. It converts between a letter, an EU size and four body references, and it stops before the top of the size range that the jackets are sold in.

The steps are not uniform, and the pattern tells you what each column is for. Shoulder width grows by exactly 1 cm per step from 44.5 cm to 51.5 cm, which is a body growing at the joint. Chest grows by 4 cm a step for the first four rows, then 4 cm again to the end, which is a circumference. Sleeve length grows by 1.5 cm a step across the whole ladder, from 86 cm to 96.5 cm.

Two things about this table matter when it meets a jacket page. First, the letter at EU 48 is S, not M. Second, the ladder ends at EU 58, while the outerwear pages sell nine sizes up to 60, so the two largest jackets sit outside the chart entirely.

Where the chart and the garments stop matching inside the same house

The tops chart is a body reference and the product rows are garment measurements, and the gap between them is the whole problem. At size 48 the chart puts the shoulder at 46.5 cm; the Double Layer Jacket measures 49 cm at the shoulder, the Monogram Admiral Jacket 49 cm, the Africa Houndstooth Zoot Suit Jacket 51.5 cm and the Puffy Coat With Padded Patches 67 cm. The chart prints a 98.5 cm chest for the same size, while the Double Layer Jacket’s waist alone measures 121 cm and the Monogram Boyhood Puffer’s 136 cm. Nothing here is contradictory once the two documents are separated: one describes the body a size is cut for, the other describes the finished garment, and a jacket adds room for a layer, a fit and a season’s silhouette on top of the body figure. The practical consequence is that a 46.5 cm shoulder line tells a buyer which body the house had in mind, and nothing about the jacket that will arrive.

The distances are wide enough that the two documents cannot be used interchangeably. Shoulder to shoulder is 2.5 cm wider on the Double Layer Jacket than on the chart row for the same size, and 20.5 cm wider on the Puffy Coat. Anyone comparing a body shoulder measurement of 46.5 cm with a garment shoulder of 67 cm concludes that the coat is enormous; anyone comparing the same body figure with the Double Layer Jacket concludes that it is close. Both conclusions come from the same house, on the same label size, in the same season.

Back length at size 48, jacket by jacket

Back length is the figure that decides whether a jacket ends at the hip, below it or at the thigh, and it is also the figure that moves furthest between styles at one label size. These are the published size 48 numbers.

Read down the back length column and the same label covers 63 cm of hem position. A size 48 in the Monogram Admiral Jacket finishes at 62 cm in the back, which is a short hip-length blouson; a size 48 in the Puffy Coat finishes at 125 cm, which is a coat that passes the knee. Ordering your usual number and expecting your usual silhouette is the mistake this column prevents.

The shoulder column tells the same story with more restraint: 49 cm on three of the six, 51.5 cm on the double-breasted cut, 67 cm on the padded coat. The sleeve column splits into two groups for a reason worth its own section.

Two listings under one name, two different back lengths

The Monogram Boyhood Puffer Jacket is the clearest example of how thin the single-size publication is. Two listings for the same jacket name carry size 48 figures that do not match. The page for reference 1A5Q8B gives a back length of 69 cm, a waist of 136 cm and a sleeve, measured including the shoulder, of 93.5 cm. The listing catalogued as nvprod1630266v gives a back length of 72 cm, the same 136 cm waist, and a sleeve including the shoulder of 95.5 cm.

Three centimetres of back length and two centimetres of sleeve, on a garment that carries one name and one size label. The two entries may be two colourways rather than one item printed twice, and the house does not say which reading applies to which. For a buyer, the effect is the same: the number on the page is a reading taken on one garment, and a second reading of a nominally identical garment can move it by 3 cm. That is the margin between a jacket sitting at the hip bone and a jacket clearing it.

Why 66.3 cm and 93.5 cm can both be the sleeve

Five of the six jackets print a sleeve length between 64.5 cm and 66.3 cm at size 48. The Monogram Boyhood Puffer prints 93.5 cm and labels its own column including the shoulder. The men’s tops chart prints 89 cm at size 48 and labels its column sleeve length.

The chart explains itself in the text printed above it: sleeve length is measured from the edge of your shoulder to the base of your thumb, with the arm straight at your side. That is a shoulder-to-thumb measurement, and the eight rows run from 86 cm at XXS to 96.5 cm at XXXL. Take the Double Layer Jacket’s own published figures — a 49 cm shoulder and a 66.3 cm sleeve — and half the shoulder width plus the sleeve comes to 90.8 cm, which lands within 2 cm of the 89 cm the chart prints for the same size. So the chart column behaves like a measurement taken from the centre back, through the shoulder and down the arm, even though the instruction above it describes something shorter. When a seller quotes a sleeve length for an LV jacket, the two conventions differ by roughly 27 cm, and asking which one was used is the difference between a sleeve that fits and a sleeve that appears to be three sizes too long.

The model chest printed beside every “wears a FR 48”

The model line is the one place where the house publishes a body measurement beside the size it dressed the model in. Every jacket checked carries the same sentence in a slightly different form: model wears a FR 48 size, followed by the model’s own chest and height. Those chests are 82 cm, 86.5 cm and 92 cm, with heights of 183 cm and 188 cm. The tops chart puts a 98.5 cm chest against size 48. So each of the models wearing the size the measurements are based on has a chest between 6.5 cm and 16.5 cm smaller than the chart figure for that size. Louis Vuitton does not explain the difference on the page, and the number cannot be used the way a buyer might want to use it, which is to conclude that a 48 is cut for a smaller chest than the chart says.

What the table shows is that the models are not wearing the size their own measurements point to. A 92 cm chest against a chart that puts size 48 at 98.5 cm means the model is dressed one row down, and the two 82 cm and 86.5 cm readings sit two rows down. Whether that is styling for a looser silhouette or a different fitting convention for samples, the page does not say, and a buyer who reads model wears a FR 48 as this is your size has read a runway choice as a fit instruction.

Regular, slightly loose and oversize: the fit words carry the difference

Louis Vuitton prints a fit word against each jacket, and with the measurement block tied to a single size, the fit word is the only per-style signal about how the number behaves.

The three words sit on the same size ladder, so a buyer who wants the same silhouette in two jackets is choosing between fit words rather than between numbers. The regular-fit group is also where the garment figures stay closest to the chart: 49 cm and 51.5 cm at the shoulder are the smallest readings in the set and the ones that make the chart’s body reference usable as a starting point.

What a reseller’s tape measure has added to these figures

Two resale listings put numbers beside jackets that the house does not measure on its own pages, and one of them is a letter-sized piece rather than a numbered one.

The measured jacket is the more useful one. It is a letter M, and it measures 51 cm at the shoulder and 46 cm across the chest laid flat, which doubled is 92 cm. Neither figure matches the chart’s 46.5 cm shoulder and 98.5 cm chest for a numbered 48, and neither is a numbered 48 at all: a letter-sized jacket comes off a different ladder from the one the tops chart prints. That is the fourth measurement system in this guide, after the chart, the product rows and the model line.

Third-party charts add a fifth reading. One widely used conversion chart puts a Louis Vuitton medium at EU 48 with a 96 cm to 100 cm chest, while the house’s own chart puts the medium letter at EU 50 and calls 48 a small. Two documents, both describing a medium, one full size apart. A retailer guide built for the block describes it as European, narrow through the chest and shoulder, and advises taking one size up in knitwear and shirting while calling outerwear true to size — which is consistent with the measurement rows themselves, where the jackets are wider at the shoulder than the chart, and the neatest explanation of why two careful buyers arrive at two different numbers.

Five figures to send when you ask about a jacket size

A size question with numbers attached can be answered on the spot. These five come from a jacket that already fits and a tape laid on a flat surface.

1. Your own chest circumference, measured over a shirt across the fullest point, because the tops chart is a body reference and this is the figure it is built on.
2. Shoulder seam to shoulder seam across the back of a jacket you already wear the way you want this one to sit.
3. Chest, measured pit to pit on that same jacket and doubled, which is the number a product page prints as chest size.
4. Back length, from the collar seam to the hem, which is the column that decides where the jacket ends.
5. Sleeve, from the shoulder seam to the cuff edge, taken the way the seller takes theirs rather than the way the tops chart does.

Add the reference number from the product page and the fit word printed beside it. With a regular-fit jacket the five numbers decide the size directly; with an oversize-fit jacket they decide only how much room there will be, since the fit word has already chosen the silhouette.

Reading a photograph: collar, closure, hem, and the one thing it never shows

The photographs above answer the questions a seller works from: which line a jacket belongs to, what the collar and closure are, whether the hem is ribbed or straight, and how the body is finished. They do not carry a length. A jacket photographed against a tape measure does, and that is the image to ask for when the number is the open question.

Browse the Clothes Catalog or send the reference number, the fit word and your own chest measurement on WhatsApp. The published figures quoted above are reference data gathered for research and checked on 2 October 2026, not a statement about any particular garment. For the same question in knitwear, the Gucci hoodie sizing guide works through a letter grid with holes in it and the Moncler jacket size guide follows one number across two garments; the Burberry trench coat size guide shows what happens when a house publishes three lengths under one model name; the fabric quality guide covers what the fibre content line on a label actually establishes; and the catalog inquiry guide lists the measurements to send when a size question turns into an order.

The published pages this guide quotes