Tools
Printable Crochet Project Passport & Yarn Swatch Card
Fill in your project once and print a one-page workshop sheet that lives in your project bag: title, dates, recipient and progress, a punch strip where you tie a real strand of every yarn next to its brand, colourway, dye lot and ball count, a true-scale 10 × 10 cm swatch area with a printed centimetre and inch ruler, and a QR code that reopens the project on CrochetMetrics to re-order the yarn.
Free · No sign-up · Runs in your browser
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The sheet is a vector drawing of 186 × 255 mm that fits A4 and US Letter with 10 mm margins. The QR code is generated in your browser and contains only this page address with the project title and the first yarn; nothing is stored on our servers.
How it works: the math behind the tool
Why a project passport. Dye lots are the classic trap of long projects: two balls of the same colourway from different baths can show a visible stripe in a blanket or a sweater body. Writing the brand, colourway and dye lot number next to a physical strand of the yarn keeps all the information on one card, so you can match a new ball in a shop, ask a seller for the same lot or substitute it knowingly. The sheet has four swatch slots with a dashed cut guide, so you can cut the strip and keep it with the yarn labels, plus a box for how many balls you own against how many the pattern needs.
Printed to scale. The whole sheet is drawn as a single vector graphic in millimetres, 186 × 255 mm, which fits both A4 and US Letter with 10 mm margins. Because it is vector, the 10 × 10 cm swatch square and the rulers – 100 mm with millimetre ticks and 4 inches with sixteenth-inch ticks – keep their real size when you print at 100 % or "actual size". Check the ruler against a tape measure once after printing: if the browser scaled the page to fit, the swatch square will no longer be 10 cm and the dialog needs the scale set to 100 %.
Sheet 186 × 255 mm (A4 or US Letter, 10 mm margins) · Swatch area 100 × 100 mm · Rulers 100 mm (1 mm ticks) and 101.6 mm = 4 in (1/16 in ticks) · QR ISO/IEC 18004, level M
From any calculator in one click. Every main calculator on CrochetMetrics has a Print Project Passport button that carries the pattern or tool name, the yarn and the number of balls you just calculated into this sheet, so you only add the dates and the dye lots. The QR code encodes the project address with its title and first yarn: scanning it from the printed card reopens the sheet with buttons to buy the same yarn on Amazon. Nothing is stored on our servers – the project lives in the address and in the paper.
Last updated: November 8, 2026
Frequently asked questions
How do I print the project sheet at the right size?
Choose A4 or US Letter, press Print Project Passport PDF and set the scale to 100 % or "actual size" in the print dialog, not "fit to page". Measure the printed 10 cm ruler with a tape measure: if it is exactly 10 cm, the swatch square and the inch ruler are also to scale.
Why should I write down the dye lot of my yarn?
Balls dyed in different batches can differ slightly in shade even with the same colour name. Keeping the dye lot number next to a strand of the yarn lets you buy a matching ball later or plan where to alternate two lots so the change does not show.
Can I save the project sheet as a PDF?
Yes. In the print dialog choose "Save as PDF" or "Microsoft Print to PDF" as the printer. The PDF keeps the vector ruler and the QR code, so it prints to scale later on any printer at 100 %.
What does the QR code on the sheet open?
It opens this page with the project title and the first yarn already filled in, with buttons to find the same yarn and colourway on Amazon. It is generated in your browser and contains only the project address.