How artwork gets split across a shoe

The most common disappointment in custom footwear is not a printing defect. It is a file that looked fine on a phone screen and now has a line running through the middle of a letter, or a logo that appears on the toe but stops dead at a stitch line it was never meant to cross.

None of that is the printer's fault. It happens because a pair of shoes is a set of separate leather panels sewn together, and an image is a rectangle. Getting one onto the other is a geometry problem, not a colour problem. Here is how that problem is actually solved, with the real numbers from our own library.

A pair is not one surface

On a low-top sneaker the upper is assembled from a quarter, a toe cap, a tongue, an eyelet stay, a heel counter, a collar and several smaller trims — each cut flat from a hide, printed, then stitched. Every panel is printed separately. A design that spans the seam is not one continuous print; it is two prints that have to line up after sewing.

How many pieces depends on the pattern. Our current range, counted panel by panel:

Sixty-six panels across eight styles. The Blade and Everyday sneakers each ship in two colourways with identical panel geometry, so six distinct patterns are listed. Two panels on the Classic Low-Top are printed mirrored, because the left and right pieces are cut from the same pattern flipped over.

Three ways to put a flat image on a panel

There are only a few honest approaches, and they behave very differently.

We use the third. It costs more geometry work up front, but it is the only one where the position you see in the designer is the position that gets printed — no surface curvature in between, no projection that has to guess at depth.

What happens between your file and the printer

The path is four steps, and the numbers below are pulled from the Classic Low-Top.

1. Placement. Your image sits on a design canvas measured in logical units — 611 × 800 on the Classic Low-Top, roughly 3:4. This is a coordinate space, not a pixel size; it lets one layout survive being reprinted at different scales.
2. Sampling. Every panel owns a rectangular sampling region on that canvas. The Classic Low-Top's largest side panel takes 440 × 456 units starting at a fixed offset, for example.
3. Enlargement. That region is scaled up to the panel's production raster — 1342 × 1106 pixels for that same panel, about 3×. Across the whole library the median enlargement is 2.9× and the worst case is 4.8×.
4. Cutting. The enlarged image is masked to the panel's actual outline, then the mirrored pieces are flipped before output.

Step three is the one that decides whether your file is good enough, and it is why the resolution question has a precise answer rather than a vague one.

So how big does my image need to be?

Follow the chain. To fill a 1342-pixel-wide panel from a 440-unit sampling window on a 611-unit-wide canvas, the artwork needs to be about 1,860 pixels wide to arrive at the printer with no interpolation at all. Under that, the file still prints; it is simply being enlarged, and enlargement is soft. On the styles with the most aggressive enlargement — the Blade and Air-Cushion patterns, at 4.3–4.4× on their largest panels — a 1,000-pixel file is being stretched further than it can carry.

A practical target: 2,000 pixels on the short edge. That puts four panels in five at native resolution across the whole range, with the remainder upscaled by at most 1.46×. 2,400 pixels covers 98%. The full distribution, and the one panel that needs 2,916, are in the measurement write-up.

Where designs break at the seams

Four failures account for nearly every artwork revision we send back.

• Hairlines across a stitch line. A one-pixel rule or a thin outline that crosses a seam will not line up after sewing. The panels are cut, printed and assembled separately; a half-millimetre of drift reads as a break.
• Type near a panel edge. Seam allowance is taken from the edge of the printed area. Letters within a few millimetres of it get clipped.
• Mirrored panels and lettering. Two panels on the Classic Low-Top are flipped. Any word placed on them prints reversed — correct for a pattern piece, wrong for a word.
• Transparent PNGs with soft edges. A feathered or anti-aliased edge becomes a visible fuzzy rim once the image is enlarged 3–5×. Cut hard, or keep the fade well inside the panel.

Check your own file before you order

You do not have to reason about any of this in the abstract. The panel preview tool runs the same sampling and cutting step in your browser: upload an image, pick a style, and see each of that style's panels as it will actually be cut, with the production size of every piece printed underneath.

What this means when you design

Four rules cover almost everything:

1. Design per panel, not per shoe. Place your subject on the one panel you want it on — the toe cap, the quarter, the heel — and let the rest of the pattern be pattern. A subject spread across a seam is a subject cut in half.
2. Keep type and faces away from panel edges. Centre them within a panel and leave a clear margin on all sides.
3. Start at 2,000 pixels. Export at that size before uploading, not after.
4. Look at the panels before you pay. If something breaks at a seam in the preview, it will break on the shoe.

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