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| Decision field | Open accessKnitting Needle to Crochet Hook Size ChartGlobalRemove | Free accountFOURSOURCE Supplier NetworkGlobalRemove | Open accessSewing Length ConverterGlobalRemove | Open accessTech Pack Definition, Contents & LimitsGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Learn techniques | Source production | Find patterns & fit | Source production |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Yarn | Production | Patterns & fit | Production |
| Best for | Finding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gauge | Searching global apparel and textile production capabilities | Translating a length already stated by a pattern, controlled specification, sewing tool, or seam allowance | Understanding what a tech pack must control before using a template or releasing work |
| Know before using | A shared nominal diameter does not make a knitting needle and crochet hook interchangeable or predict equal gauge or fabric. The reference is not a physical measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, or project approval. | The company count is a changing platform claim. Search fields, profiles, certificates, locations, and account access do not independently verify the legal entity, factory ownership, capability, capacity, certificate validity or scope, compliance performance, delivery, or project fit. Confirm the site and subcontracting, credentials with issuers, samples, audits when appropriate, specifications, contracts, and commercial terms. | This is a length-unit translation reference. It does not identify the measured feature; select, approve, or change a seam allowance; establish a universal fraction; interpret an unstated cutting or stitching line; or replace the exact pattern version, controlled specification, material and seam evidence, sample, production method, equipment, tolerance, or release authority. | An orientation rather than a completed product record; it does not supply a universal format, licensed standard content, measurements, tolerances, construction settings, labels, approvals, compliance conclusion, or product-release authority. |
| Practical access | ||||
| For | Makers | Apparel brands | Both | Apparel brands |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Free account | Open access | Open access |
| Format | Stitch Authority | Marketplace | Stitch Authority | Stitch Authority |
| Source type | Stitch Authority | Commercial marketplace | Stitch Authority | Stitch Authority |
| Source and review | ||||
| What the source establishes | Rechecked July 28, 2026. The lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows, aligns hooks and needles only when their nominal millimetre value matches, and leaves missing rows or aliases unfilled. | FOURSOURCE's current public network page presents an operator-reported global company count and country or territory search. It says logged-in users can narrow results by compliance certificates, product groups, fabric types, target groups, minimum order quantities, and other fields, with a free-trial and supplier sign-up route. | NIST states that 10 millimetres equal 1 centimetre and that one inch is exactly 25.4 millimetres. The tool uses those relationships, displays rounded equivalents, exposes the size difference to the nearest 1/16 inch when converting to inches, and preserves valid value, source-unit, and target-unit state in the URL. | The guide cites published ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it discloses that ISO 10013:2021's 2026 systematic review is at close-of-review stage and separates every cited authority from product-specific technical and market decisions. |
| Linked page reviewed | Jul 28, 2026 | Jul 21, 2026 | Jul 30, 2026 | Jul 27, 2026 |
| Next review due | Jul 28, 2027 | Jan 17, 2027 | Jul 30, 2027 | Jul 27, 2027 |
| Inspect | ||||
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