A leather watch strap may seem like a simple object, but behind this apparent simplicity there can be very different internal constructions.

In this article, I want to explain the main construction types of leather watch straps and show what elements they are made of. We will look at top leather, lining leather, padding, reinforcements, edge construction, stitching and other structural decisions that affect the appearance, fit, durability and behaviour of a strap in daily wear.

I will use professional terms such as cut strap, semi-rembordé strap, rembordé or wraparound construction, lining leather, padding leather, reinforcement and Saddler’s Seam. The goal is not to make the subject more complicated, but to give a clear language for describing watch straps.

This is useful not only for craftsmen. For a watch owner, understanding strap construction helps to choose more precisely, ask better questions and see the difference between straps that may look similar at first glance. It is especially important in bespoke work, where the strap is not made as an abstract accessory, but for a particular watch, selected leather, clasp type and the wrist of its owner.

Strap Construction: More Than Leather and Stitching

On the outside, there is the top leather, or upper leather. This is what creates the first impression: colour, grain, sheen and texture. It is what we see first. But the internal structure of a strap is no less important. Any leather watch strap can be understood as a system made of several elements.

On the inside, there is the lining leather. This is the part that touches the wrist every day, so it affects comfort, hygiene and the durability of the inner side of the strap.

Between the top leather and the lining, there may be padding leather. It forms the thickness, volume and profile of the strap, from a nearly flat classical construction to a more pronounced raised profile that visually connects the strap with a larger watch case.

Inside the strap, reinforcements and intermediate layers such as cotton fleece may also be used. These elements are usually not visible, but they help the strap keep its shape, limit unnecessary stretching, support the hole area and influence how the strap behaves when it bends.

The purpose of reinforcement is to strengthen critical structural areas while preserving the flexibility and tactile qualities of the strap: how it feels in the hand, its softness, natural bend and overall material perception. That is why I see reinforcements not as a minor technical detail, but as part of the internal architecture of the strap. I have written separately about why reinforcement materials are used in leather goods, and, more specifically for watch straps and fine leatherwork, about Jaeger reinforcements.

Another important subject is the edge of the strap. It may be an open cut edge, finished and painted with edge paint, or it may be formed by folding the top leather around the edge, as in a rembordé construction. This is not just a decorative difference. The way the edge is made affects appearance, wear, repairability and the overall feel of the strap.

And finally, stitching. It may be matching or contrasting, single or double, running around the entire perimeter or used only in selected areas. The absence of visible stitching can also be a deliberate structural and aesthetic decision. Stitching sits at the intersection of design, construction and durability.

Semi-rembordé Strap: A Production-Oriented Construction

I mention the semi-rembordé strap here primarily for understanding the general typology. I do not use this method in my own work, but it is important as an example of a different production logic.

This type of construction is closer to serial machine production. Speed, repeatability, stable geometry and ease of further assembly are important here. The strap has to fit well into the production process: cutting or punching, gluing, forming, stitching, and controlling dimensions and parameters.

In a semi-rembordé construction, the top leather usually covers the upper surface and the side area of the strap, but it does not fold under the lining as deeply or as fully as in a full wraparound construction. The lower closure is formed by the lining leather, and the junction between the top leather and the lining becomes a critical structural area.

This is one of the weaker points of such a strap. The edge of the top leather in this area is usually skived, glued and finished, but it is not held by the lining as securely as in a deeper wraparound construction. During wear, the strap bends, rubs against the skin, clothing, clasp and keepers, and reacts to moisture, heat and perspiration. Over time, this may cause the top leather at the edges to lift, exposing the inner layers of the strap.

For this reason, the durability of a semi-rembordé strap strongly depends on assembly accuracy, the quality of the adhesive bond, edge preparation and careful use. Such a strap can be perfectly acceptable within its production segment, but its limits should be understood. It is built primarily around a repeatable manufacturing operation, rather than around an individual construction choice for a particular watch, leather, clasp and wrist.

This is why this logic is less close to my bespoke approach. In an individual strap, I usually start not from what is faster and easier to assemble, but from which construction best suits the leather, the watch case, the clasp, the desired thickness and future use.

Rembordé / Wraparound Construction: The Edge as a Continuation of the Top Leather

Rembordé, or wraparound construction, is a construction in which the top leather is folded around the internal structure of the strap. As a result, the edge is formed not by a separate paint layer or an exposed cut surface, but by the top leather itself.

The main visual effect of this construction is that the top leather does not stop at the edge. It continues from the upper surface of the strap, wraps around the side and moves toward the inner side. Because of this, the colour, texture and character of the leather are perceived as continuous, and the strap looks more unified, softer, more composed and more refined.

This effect is especially visible on exotic leathers: alligator, crocodile, lizard and other materials with expressive texture. In a cut strap, the eye reads the painted edge as a separate area. In a rembordé strap, the eye sees the continuation of the same leather. Even if the watch owner does not know the technical name of this construction, it is often perceived as more noble and complete.

The same visual logic can be seen in finished bespoke straps, especially when expressive leathers such as lizard or alligator are used.

Examples from Bespoke Objects: two Ulysse Nardin Caprice straps in lizard and alligator leather, showing how material, edge, stitching and profile shape the final appearance.

But this result does not happen by itself. For the top leather to fold cleanly around the curves, its edge has to be carefully skived. In the folded area, the leather may be around 0.5 mm thick, or even thinner. This is especially important at the tip of the long part of the strap, where the shape narrows and the radii become small. If the leather in this area is too thick or too stiff, it cannot be folded cleanly: the edge becomes bulky, uneven and disrupts the geometry of the strap.

Not every leather is well suited to rembordé construction. Smoother, denser and more stable leathers are easier to skive into a clean, thin fold. Leather with deep relief, loose structure or irregular thickness may not tolerate this thinning well. Excessive skiving can create weak spots, cuts or holes.

The lining leather also requires preparation. It closes the folded edge from the inside and has to be thinned almost to zero at the edges so that no step is felt on the inner side. This makes the strap neater and more comfortable on the wrist, but it also creates another compromise: a very thin lining at the edge reacts more quickly to moisture, friction and wear.

For this reason, rembordé should not be considered the best solution for every strap. It is a premium construction, but it requires suitable leather, precise preparation and an understanding of how the strap will be used. The thinner and cleaner the fold, the more beautiful the edge can be. But the most delicate areas also become more sensitive.

This is extremely meticulous and delicate work. In serial production, it requires precise equipment, stable materials and well-adjusted processes. In handmade work, it requires the experience of the craftsman: one has to understand how far a particular leather can be thinned, how it will behave when bent, where a beautiful edge will remain strong, and where it may become too vulnerable.

In practice, rembordé straps are especially well suited for folding clasps, butterfly clasps or other deployant-type clasps. In this case, the strap bends less every time it is put on, it does not have to be pulled constantly through the buckle and keepers, and the holes and finely folded edges receive less mechanical stress.

With a traditional pin buckle, the load is higher. The tail of the strap bends each time, passes through the keeper, rubs against the hardware, and the holes and edges wear faster. This does not mean that rembordé cannot be used with a classic buckle. It means that the construction, leather and wearing conditions should be considered in advance.

Cut Strap: A Cut Edge Can Be Simple or Premium

A cut strap is a strap in which the edge is not formed by folding the top leather around the internal structure. The material is cut to shape, and the exposed edge is finished separately. But within this category, there are different levels of complexity.

The simplest version of an open edge is a strap where the material is cut to shape, and the edge is carefully trimmed, burnished, treated or minimally coloured. Such a strap can be single-layer: without lining, without padding, without intermediate materials and without a complex folded edge. In this case, the construction relies not on a multi-layer assembly, but on the properties of the material itself.

A good example is a strap made of shell cordovan. Cordovan is dense, uniform and smooth. It can be polished well along the edge and can look very refined even in a simple single-layer construction. In such a strap, the value is not in complex internal architecture, but in the material itself: its density, shape retention, smooth surface, clean edge and noble ageing.

A similar logic can be found in NATO and Zulu straps. These are not classical multi-layer leather straps, but they are useful as examples of single-layer construction logic: one layer of material performs almost all the work. There is no leather lining, no complex padding and no multi-stage edge finishing in the usual sense.

A more complex and fully premium version of a cut strap is a multi-layer strap with a cut edge and professionally painted edge. In this construction, the top leather, lining and possible internal layers are cut to shape, glued, stitched, and then the exposed edge is sealed and finished with edge paint.

This construction can be very clean and appropriate. It gives precise edge geometry and suits straps where a strict profile, sharp line and controlled shape are needed. But the durability of this edge depends strongly on the quality of the paint, edge preparation and application technology. If the coating is poorly made or becomes damaged over time, the layers become more visible and the edge may require restoration.

It is important not to confuse simple functional edge treatment with true craft edge finishing. In leathercraft, a painted edge is not simply “painting the side”. It is a multi-stage process: a clean cut, edge levelling, applying primer or base coat, drying, sanding, applying further layers of paint, sanding again and final finishing.

When done correctly, a painted edge is not just a layer of paint on the side of the strap. After drying, water-based polymer edge paint forms an elastic polymer coating that closes the cut, visually unifies the edge and helps protect it from abrasion, deformation and everyday moisture. The quality of such an edge depends on proper technology and the use of high-quality materials.

A well-finished edge does more than cover the cut leather. It shapes the appearance of the strap. Such an edge looks dense, composed and complete. It shows the level of handwork no less than a clean stitch or an accurate strap shape.

This approach is closer to my own craft practice. Here, quality is defined not only by the material, but also by the number of precise manual operations.

A painted edge can also be part of the design. The colour can be matched tone-on-tone so that the border between leather and edge paint almost disappears. Or a contrasting colour can be used, making the edge an independent visual line of the strap.

In my work, I use a professional painted-edge technique based on water-based polymer edge paints by Fenice and Stahl. In this process, the sequence of operations and the experience of the craftsman play a significant role.

For this reason, a cut strap should not automatically be seen as a simple or inferior option. A single-layer shell cordovan strap with a well-polished edge and a multi-layer strap with a hand-finished painted edge are different constructions. But both belong to the logic of the cut edge.

Examples from Bespoke Objects: two cut strap variations showing how painted edges can appear in both flatter and more structured strap constructions.

Padding: Flat Strap, Padded Strap and Raised Profile

Padding is often understood simply as a way to make a strap thicker. In reality, its role is broader: padding forms the strap profile, its visual volume, its behaviour when bent and its fit on the wrist.

It can be almost invisible, soft and gradual. Or it can create a pronounced raised profile near the watch case, so that the strap visually continues the mass of the case and does not look too thin or accidental.

For thin classical watches, excessive volume often looks out of place. Such a strap begins to compete with the case rather than complement it. In this situation, a flatter and calmer construction usually works better.

For larger watches, by contrast, a very thin strap can look weak. It does not hold the visual balance and does not continue the geometry of the case. In that case, padding helps create a more convincing transition: the necessary thickness near the case, a gradual reduction of volume and a stronger presence on the wrist.

But good padding should not simply be “thick”. What matters is not only the maximum thickness in millimetres, but how this thickness is distributed. The raised profile may be short or long, gradual or more pronounced, higher near the case and almost invisible closer to the tip of the strap.

This affects not only appearance, but also comfort. Padding that is too stiff or too sharply shaped can prevent the strap from wrapping around the wrist and can create a pressure point near the watch case or clasp. Padding that is too soft, on the other hand, may lose its profile more quickly.

This is why, in a bespoke strap, I consider not only the desired thickness, but also the watch case, strap width, lengths of the two parts, clasp type, top leather, lining and how the strap should work around a particular wrist.

This subject is directly connected with what I call an ergonomic or anatomical watch strap. In a separate article about the ergonomic leather watch strap, I explain in more detail why strap comfort depends not on leather softness alone, but on the entire geometry of the object and how it behaves on the wrist.

Lining Leather: What the Client Feels Every Day

The visual perception of a strap is shaped by its outer side. However, in real use, the inner side is no less important: it is constantly in contact with the skin and is exposed every day to friction, heat, moisture and bending.

For this reason, lining leather should not be treated as a secondary layer. The lining affects comfort, hygiene and the service life of the strap. It should feel pleasant against the skin, while being sufficiently resistant to the natural traces of daily wear.

In a premium strap, the lining leather should not be accidental. Good lining leather should have the right properties from the beginning: it should be high-quality, pleasant to the skin, water-resistant and hypoallergenic. This does not turn a leather strap into a swimming strap, but it helps it withstand normal conditions of regular wear.

That is why the inner side of the strap is not a hidden technical detail, but one of the key parts of the construction.

Stitching: Decorative Line or Structural Element

Stitching on a strap is often perceived as a decorative line. And indeed, thread colour, stitch length, distance from the edge and thread thickness can noticeably change the appearance of the strap.

But stitching is not only an external element. In machine stitching, two threads are usually used: an upper thread and a lower thread. This means that the top side and the lining side may differ in colour, thickness and visual stitch pattern.

In a handmade saddle stitch, or Saddler’s Seam, one thread is used with two needles. It passes through the entire seam and is visible on both sides of the strap. This does not allow the front and lining sides to be separated as freely by thread colour, but it creates a more unified perception of the stitching and requires especially precise thread selection.

At the same time, handmade stitching is not monotonous. It may differ in stitch length, slant, density and overall rhythm. Depending on the task, such stitching can be almost invisible or, on the contrary, become an expressive part of the design.

In my own work, I prefer the handmade saddle stitch. For me, it is important not only as a trace of handwork, but also as part of the construction: the stitching should work together with the leather, strap thickness, edge and overall logic of the object.

Construction as a Conscious Choice

When buying a new strap or ordering one from a craftsman, it is not always necessary to repeat the previous experience or copy the old strap, even if it was original. The old strap can be a useful reference for checking dimensions, shape and wearing habits. But it is not always the best possible solution.

Sometimes it is a factory strap made for a general watch model, not for a particular wrist. Sometimes it is a previous replacement chosen by chance or availability. Sometimes it is a manufacturer’s compromise: in cost, production efficiency, serial assembly or universal fit.

My role as a craftsman is to explain the difference between possible solutions and suggest what makes sense for the client and their watch.

Choosing or ordering a new strap often begins with discussing appearance, but almost inevitably leads to a discussion of construction. Construction determines how the strap will sit on the wrist, how it will work with the watch case, how it will interact with the clasp and how it will behave in wear.

That is why a bespoke watch strap is not a mechanical copy of an old strap, but a conscious structural decision for a particular watch, wrist and wearing scenario.