Saddle Stitching Explained: Why Hand Stitching Outlasts Machine Stitching

Ask any leatherworker worth their tools about saddle stitching and you will get the same answer: it is not the fastest way to stitch leather. It is not the easiest. It is, however, the strongest. It is also — and this matters to the people who wear the things I make — the most honest. What you see in a saddle-stitched piece is the full investment of the maker's time and skill, stitch by stitch, in a way that a machine cannot replicate.

In ten years of making bespoke leather watch straps, every single strap that has left this studio has been saddle-stitched by hand. This article explains what that actually means — technically, mechanically, and from the point of view of a buyer who wants to understand what they are paying for when they commission a hand-stitched leather watch strap.

The saddle stitch is a two-needle technique. Two needles, one on each end of a single length of thread, are worked simultaneously through pre-pierced holes in the leather. The first needle passes through a hole from one side; the second needle follows through the same hole from the opposite side, looping through the thread that the first needle is already carrying.

Each stitch is a complete, self-locking knot. If one part of the thread breaks — through wear, abrasion, or damage — the stitch on either side of the break holds. The seam does not unravel.

This is the fundamental mechanical difference between saddle stitching and machine stitching. Understanding it explains everything else.

A conventional sewing machine uses a lock stitch — a top thread and a bobbin thread that interlock in the middle of the material being sewn. This is fast and perfectly adequate for fabric and lighter leathers. The problem is structural: if the thread breaks at any point, the lock can be released sequentially from that point outward. The seam unzips.

For garments and upholstery, where the stitching is largely decorative or under low stress, this is rarely a significant issue. For a watch strap — a narrow item under constant flexion, worn against the skin, exposed to sweat and moisture — the durability of the stitch is not a secondary consideration.

The process begins well before the first needle is threaded.

I use three thread types at Lombard Bespoke — classic polyester, waxed linen (Fil Au Chinois), and Ritza Tiger braided polyester. Each has a different character and is suited to different strap styles and leathers. You can read in detail about the differences on the Thread Guide.

Regardless of type, the thread is cut to length — typically around four times the length of the seam being stitched — and a needle is attached to each end. For waxed linen, the thread is worked through beeswax before stitching; this reduces friction, helps the thread seat cleanly in the groove, and bonds the thread to the leather over time.

Before a stitch can be placed, the hole must be made. This is done with a pricking iron — a tool with multiple evenly spaced tines that is pressed into the leather to mark stitch positions. The spacing between tines determines the stitch density. Finer work uses tighter spacing; heavier leathers may use a wider pitch.

The pricking iron is also what gives a hand-stitched piece its visual regularity. When used correctly, the holes are perfectly spaced and aligned. This is a skill that takes time — the iron must be held consistently, the angle must be constant, and the position of each strike must account for the leather's behaviour at curves and corners.

With holes in place, the stitching begins. The first needle is passed through the first hole and pulled until the thread is centred — equal lengths on each side. From that point, both needles advance through successive holes in a specific pattern: first needle through, second needle follows, the thread is pulled firm, the tension is checked by feel. Knot by knot.

The tension matters enormously. Too loose and the stitching will look irregular and will not grip the leather. Too tight and the leather may pucker. The right tension is something you develop over thousands of metres of thread — it becomes intuitive, checked not with a gauge but with your hands.

At the end of the seam, the thread is locked with a series of back-stitches through the last two or three holes, then trimmed close to the leather surface. In a well-finished piece, the knot is nearly invisible. The thread ends are often heat-sealed to prevent fraying, depending on the thread type.

On the finished strap, a saddle-stitched seam has a characteristic diagonal orientation — each individual stitch sits at a slight angle rather than perfectly upright. This is the natural result of the two-needle technique. It is the tell of hand stitching, and once you know what to look for, you will see it immediately on a quality piece.

A machine lock stitch, by contrast, tends to produce stitches that appear more upright from the front, with a slightly different texture from the back.

To assess whether a strap has been hand-stitched:

• Look at the angle of each stitch from the front. Hand stitching has a consistent diagonal lean.
• Look at the back. The thread should be continuous and even, with no bobbins or loops.
• Run your fingernail along the stitch line. A well-seated saddle stitch sits in a groove and feels smooth. Machine stitching often sits on top of the surface.
• Check the ends of the stitch line. A hand-stitched piece will show a discrete lock at each end; machine stitching is sometimes backstitched and can look abrupt.

For a guide to what different stitch patterns look like on finished straps, take a look at the Strap Styles guide, which includes accent, classic, box, and double stitching options.

The tools used in saddle stitching have changed very little in centuries. This is not sentiment — they simply work.

Pricking irons — available in various pitches (4mm, 3.5mm, 3mm for watch strap work). The pitch is chosen based on the leather thickness, the thread, and the aesthetic of the piece.

Harness needles — blunt-tipped needles that push through pre-pierced holes rather than piercing the leather themselves. Using a blunt needle through a pricked hole means the leather fibres close around the thread rather than being cut.

Thread — see above. The choice of thread is as much an aesthetic decision as a technical one. Waxed linen has a matte, old-world character; polyester is vivid and consistent; braided Ritza Tiger is bold and sits proud on the leather.

A stitching pony or clam — a clamp held between the knees or in a vice that holds the work steady while both hands are free to manage the needles. For fine work on a narrow watch strap, I typically stitch by hand without a pony for the greater tactile control it affords.

A watch strap is under stress that most leather goods never experience. It is flexed thousands of times per day — every time you move your wrist. It is exposed to sweat, moisture, UV light, and the pressure of the buckle pin. It is a narrow item that concentrates stress along its length rather than distributing it across a broad surface.

For all of these reasons, the structural integrity of the stitch is not an aesthetic bonus — it is fundamental to whether the strap performs over years rather than months.

A saddle-stitched strap, made with quality thread and seated properly in a groove, will typically outlast the watch beneath it if properly cared for. A machine-stitched strap of equivalent leather will show thread failure sooner, particularly at the points of highest flexion — at the lug end and at the buckle crease.

This is not speculation. It is physics.

The stitching on a well-made strap requires no special care beyond what you would give the leather itself. Keep the leather conditioned, avoid prolonged saturation, and allow the strap to dry naturally. The Leather Care guide covers the full conditioning process in detail.

If a stitch does fail — through extreme wear or damage rather than normal use — it can be repaired. Because the saddle stitch does not cascade-unravel, a single broken stitch stays localised. A skilled leatherworker can open the groove, remove the damaged section, and restitch without disturbing the rest of the seam.

For a standard watch strap, stitching two seam lines takes between 45 minutes and two hours depending on the leather thickness, thread type, and stitch pitch. This is genuinely one of the most time-intensive parts of making a bespoke strap.

Yes, noticeably. A finer pitch (3mm) produces a denser, more refined stitch line — appropriate for dress watches and fine exotic leathers. A wider pitch (4mm or 5mm) gives a more open, characterful line that suits sport and casual styles. I choose the pitch based on the brief and the leather.

Yes, absolutely. Thread selection is part of every commission at Lombard Bespoke. The commission form includes thread type and colour options. If you want to discuss specific combinations, describe your vision in the notes field.

The honest answer is yes — occasionally. Hand stitching is made by a human, and minor variation is inherent to the process. What distinguishes skilled hand stitching is not the absence of variation but the management of it: consistent tension, even hole spacing, controlled angles. If you find yourself examining a saddle-stitched strap under a loupe and seeing slight variation, that is evidence of what it is, not evidence of failure.

See the section above — the diagonal stitch angle, the thread texture from the back, and the character of the stitch ends are all tells. If in doubt, ask the maker to describe their stitching process. Anyone who hand-stitches will have a great deal to say about it.

Every strap made at Lombard Bespoke is saddle-stitched by the same pair of hands that cuts the leather and finishes the edges. If you would like to commission a bespoke hand-stitched leather watch strap, the process starts with a five-minute form and a reply within 24 to 48 hours.

Begin Your Commission →