How a Leather Jacket Is Made

A leather jacket is not built the way a wool coat is built. Wool forgives — it steams, it eases, it shrinks back into shape under a press. Leather does none of that: every needle hole is permanent, a stretched panel stays stretched, and no finishing will undo a seam sewn in the wrong place. That fact governs which part of the hide a sleeve comes from and how many stitches per centimetre the machine is set to.

How is a leather jacket made, from hide to finished garment?

A leather jacket passes through nine stages: hide selection, pattern making, cutting, skiving, stitching, lining, hardware, pressing and final inspection. The first four decide most of the outcome — by the time the panels reach the sewing machine, the fit and the drape are already fixed. Emilio Moretti was founded in Florence in 1917; its jackets are hand-cut and hand-finished in our ateliers in Florence and Istanbul, and made to order rather than cut to stock.

Why is every hide different?

Because leather is skin, and skin records the life of the animal. Fibre density varies across a single hide: along the backbone the fibres are tight and the leather is firm, while the belly and flanks are looser, softer and far stretchier. Insect bites, healed scars and grain variation appear where they appear.

Size varies with the animal too — a lambskin yields a small working area, calfskin more, a cowhide more again — so lambskin jackets need more panels and closer matching. Aniline leather, coloured with soluble dyes and finished without a pigment topcoat, shows all of this most openly: nothing was sprayed over the grain. Pressed finishes, such as the croc emboss on the Sabbia Croco Bomber, disguise variation; a plain smooth nappa hides nothing.

What does full-grain actually mean?

Full-grain means the outermost layer of the hide — the grain — has been left intact, not sanded or buffed. It is the most tightly packed part of the skin, which is why full-grain leather resists abrasion well and takes on patina rather than wearing through. The trade-off is that nothing was corrected away, so natural markings stay visible.

Top-grain is that same upper layer sanded to remove blemishes, then refinished, usually with a coating that evens out the appearance. Split leather comes from the lower layers left after the grain is separated off and has no grain surface at all; most suede is made from it. So when a jacket such as the Aquila Relief Biker or the Onice Biker is called full-grain calfskin, that names which layer of the skin you are wearing.

What does a pattern do that a size chart cannot?

A pattern defines the three-dimensional shape of a garment; a size chart only reports a few finished measurements taken from it. Grading is not simple scaling either — shoulders, armholes and sleeve heads change proportion differently as the size goes up, so each size is redrawn rather than enlarged.

Leather adds a constraint tailoring does not have. Wool can be eased into a curved sleeve head with steam; leather cannot, so the curve has to be engineered into the pattern, often by breaking it into more panels. That is why a close cafe racer like the Velocita Cafe Racer is a different pattern problem from a long silhouette like the Duchessa Coat, even in the same leather.

Why does hand cutting matter?

Because leather stretches more in one direction than the other, and only a person can decide where each panel sits on the skin. Leather gives most across the backbone and least along it. A cutter who knows this runs the length of a front panel along the low-stretch axis so the jacket keeps its line, and saves the stretchier areas for where movement is wanted.

Industrial cutting uses steel-rule dies pressed through stacked hides, or a laser following a nested marker. Both are fast, and both treat the hide as uniform material. A hand cutter works with a knife against a pattern, one panel at a time, moving around scars and loose belly and matching the grain between the two fronts so the jacket reads as one skin. It cannot be batched — which is what it buys.

What is skiving, and why does a seam need it?

Skiving is thinning the leather at the edges before panels are joined, so seams do not build up into ridges. Garment leather generally runs around a millimetre thick; thickness is sometimes quoted in ounces instead, where one ounce is about 0.4 mm, or one sixty-fourth of an inch. Fold two edges together and you have doubled that — add a facing or a zip tape and the seam becomes a hard rib against the wearer.

Thinning each edge first keeps the finished seam close to the thickness of a single panel. Nobody sees a skived edge; you feel its absence when a jacket sits flat at the collar and the cuff. Turned edges and welt pockets depend on it too.

How is leather stitched, and why not use more stitches?

Leather is sewn with a longer stitch than cloth, because every stitch is a hole and holes weaken the material. A stitch length of roughly three millimetres — about three stitches per centimetre — is common on garment leather; push the density higher and the seam behaves like the perforation on a sheet of stamps, giving the leather a line to tear along.

Thread is typically bonded nylon or polyester, coated to resist abrasion inside the needle holes. Needle geometry matters as much: a cutting-point needle slices a channel through heavy leather, while soft garment leathers take a rounder point that pushes fibres aside instead of severing them. Nothing is pinned, either — pins leave permanent marks, so panels are held with clips, tape or temporary adhesive. There is no unpicking a mistake out of leather; the holes stay.

How are lining, zips and hardware fitted?

The lining is built as a complete second shell and then joined to the leather one, zips go in flat by their tape and are usually topstitched, and snaps, rivets and eyelets are set with dies under pressure. The lining does real work: it lets the jacket slide over a shirt, carries stress across the shoulder, and in a quilted or shearling piece it is the insulation itself. Shearling is sheepskin tanned with the fleece still attached, so a garment such as the Artico Shearling inverts that logic — the wool is the lining, and skin and fleece can never be separated.

Then the jacket is pressed: glued seam allowances rolled or hammered flat and set with dry heat, never steam, since moisture combined with heat can shrink leather or leave a permanent glazed shine. Finally it is inspected closed and open — symmetry between the fronts, zip travel end to end, hardware function, thread ends, panel match. The 360-degree view on each product page is that same inspection, made available before you order.

What does made to order actually change?

It changes when the leather is cut. In stock production, hides are cut against a forecast: the size run is decided in advance, cut in bulk and stored, and whatever does not sell has already consumed the hide. Made to order reverses that — the pattern is laid on the skin after the order exists, so nothing is cut speculatively.

The consequence is in how the hide gets used. Because hides are irregular and cutting is a nesting problem, a cutter working one order at a time can place panels around defects and keep offcuts for facings, welts and small parts. Nothing is produced that nobody asked for — and in clothing, unsold finished garments waste far more material than offcuts do. Emilio Moretti cuts to order across the full XS–XXL range, so every size is made the same way.

Neither method is a fraud. Die cutting is precise, and a factory line will produce a thousand near-identical jackets faster than any atelier could produce ten. What it cannot do is look at one skin and decide that this scar goes under the arm — which is why two jackets from one pattern are never the same object.

The short answer

• Nine stages: hide selection, pattern, cutting, skiving, stitching, lining, hardware, pressing, inspection — the first four decide most of it.
• Full-grain means the outer grain layer is intact. Top-grain is sanded and refinished; split leather has no grain layer at all.
• Hand cutting follows the stretch of the skin: firm along the backbone, loose at the belly. Dies and lasers read nothing.
• Skiving and stitch density are invisible decisions — thinned edges keep seams flat, a longer stitch stops a tear line forming.
• Made to order means the hide is cut after the order exists, so no garment is made that nobody asked for.

You can see how these decisions differ across silhouettes in the full collection of thirty models, split between men's jackets and women's jackets, and read where the method comes from in our story.