A colourwork chart is a pixel grid that predates pixels

A grid of filled and empty squares forming an eight-pointed star, rows numbered up the side, and a key down the left listing what each symbol means.

It's a set of instructions. It's also, without changing a thing, a geometric print.

Why does a knitting chart work as a graphic?

Because it was already a grid of high-contrast squares.

Charts have to be readable at arm's length by somebody counting under lamplight, which forces the same qualities a fabric print needs: hard edges, flat fill, strong repeat, no gradients. The constraint that made it a good instruction sheet makes it a good print.

It also sits in a long tradition. Grid-based ornament predates knitting charts by centuries and predates screens by rather more — which is why pixel work still reads as ancient and modern at once.

What should the chart show?

Something they actually knitted.

A motif from a finished yoke, a section of a colourwork band, the repeat from a pair of gloves that took a winter. Charting a project they completed turns the shirt into a record rather than a pattern library.

The row numbers matter more than they look. They give the design an axis and they're the detail that tells another knitter this is a real chart rather than decoration shaped like one.

Can it use a published pattern?

A designer's chart is their work, so a reproduction of one isn't available for merchandise.

Knitting patterns are written and drawn documents, and independent designers make their living from them — this is a community that takes attribution seriously and notices quickly. The stitch symbols themselves are shared notation, in the way musical notation is shared, but a particular motif arranged by a particular designer isn't.

Their own chart, a traditional motif, or a fresh one drawn on the grid all avoid the question. And traditional geometric motifs are a deep, old, unowned vocabulary.

Does it work for other fibre crafts?

Each has its own document, and they're all grids or diagrams.

Cross stitch shares the chart form outright. Weaving has a draft — threading, tie-up and treadling, which is a strikingly graphic four-block layout. Crochet has symbol diagrams that radiate from a centre and look like nothing else. Quilting has block construction drawings.

A weaving draft in particular is one of the more beautiful technical documents in any craft, and almost nobody outside weaving has seen one.

Is it a gift or something for a maker to sell?

Both work, and the maker version has an angle.

Somebody who designs patterns can print their own chart as merchandise that only they can sell, which is a rare position to be in. For a gift, the appeal is that it's specific to one project one person made.

For a group — a knitting night, a guild — the same motif on different garment colours reads as a set rather than a uniform.

What about the stitch key?

It's the part that makes it look like an instrument.

A column of small symbols with their meanings beside them adds a second texture and a strong vertical edge, and it's genuinely informative to a knitter. It should carry fewer entries than a real key — six or eight — set larger than a pattern would print them.

Does it print well?

Unusually well — it's flat squares on a grid.

Hard-edged blocks with even spacing are close to the friendliest possible artwork for fabric. The one thing to watch is grid density: a chart at true pattern scale can run sixty stitches wide, and sixty columns across a chest reduces each square to a speck. Around twenty-four to thirty columns keeps the individual stitches legible.

Lilac, oatmeal, heather and moss read as yarn colours. Two inks is plenty and one often looks better.

How do I get one made?

Describe the chart at JustOG — the motif, the grid size, and what the key should list. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.

Designs other people have published are in the shop.

Somebody counted every one of those squares.