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| Decision field | Open accessFabric Mass Unit ConverterGlobalRemove | Free + paidThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessYarn Database EU Dyers and MakersEuropean UnionRemove | Free accountRibblrGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Choose materials | Find patterns & fit | Choose materials | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Materials | Patterns & fit | Yarn | Patterns & fit |
| Best for | Translating the same fabric mass-per-area result between metric and U.S. customary listings | Searching current and out-of-print sewing patterns | Finding independent EU yarn or fibre dyers with off-Ravelry purchase routes | Following interactive patterns with progress tools |
| Know before using | The result is a numerical unit conversion, not a new measurement or conformance decision; it does not establish sample or lot representativeness, significant digits, drape, warmth, opacity, thickness, stretch, strength, shrinkage, durability, sewability, end use, target, or tolerance. | Community members add and quality-control the records, so confirm sizing, measurements, fabric suggestions, format, availability, errata, license, and purchase terms with the designer or publisher. Adding an entry to a stash does not provide the pattern files. Saved searches and private PDF storage are paid Plus features, and a listing or review does not establish pattern accuracy or fit. | It is one curator's intentionally selective, off-Ravelry-oriented database, inventories change, and paid supporters can receive rotating priority placement; verify availability, fibre claims, shipping, and terms directly. | Ribblr supplies the reading and publishing format, but each designer remains responsible for the pattern's math, sizing, instructions, testing, corrections, licence, and support. Interactive conveniences do not prove fit or technical accuracy. Pattern prices and available features vary, and following an ePattern depends on an account and continued platform access. |
| Practical access | ||||
| For | Both | Makers | Makers | Makers |
| Location or jurisdiction | Global | Global | European Union | Global |
| Access | Open access | Free + paid | Open access | Free account |
| Format | Stitch Authority | Community | Directory | Marketplace |
| Source type | Stitch Authority | Community database | Community database | Commercial marketplace |
| Account, payment, and exit | ||||
| Access scope | Not yet reviewed at this level. | Sewer searching pattern records or organizing patterns, projects, fabric, notions, and private files. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Before an account | Not yet reviewed at this level. | Browse the pattern database, guide, designers, publications, and public community areas without creating an account. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Free-account boundary | Not yet reviewed at this level. | A free account needs no card and supports a stash, wishlist, projects, reviews, and personal organization. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Payment boundary | Not yet reviewed at this level. | Plus adds PDF pattern storage, collections, saved searches, bulk editing, and other workflow features on monthly or annual billing. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Cancellation or exit | Not yet reviewed at this level. | Cancel through an in-account link. Paid features remain through the current billing cycle, then the account returns to free features. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Saved work and data | Not yet reviewed at this level. | The terms say submitted materials remain yours, but the checked public pages do not explain a full export or how stored PDFs behave after downgrade. Keep originals outside the platform. | Not yet reviewed at this level. | Not yet reviewed at this level. |
| Source and review | ||||
| What the source establishes | The calculator uses the NIST SP 811 Appendix B.8 conversion from avoirdupois ounces per square yard to kilograms per square metre and links to a source-reviewed fabric mass record for method, sampling, conditioning, and product controls. | Threadloop's official guide describes an independent, fully crowdsourced database covering available and out-of-print sewing patterns. Its search supports pattern type, fabric type, age group, body type, cup size, level, format, file features, language, measurements, availability, and other filters; members can also track a stash, wishlist, projects, reviews, and discussions. Current terms state that the free plan requires no card, paid upgrades start billing immediately, cancellation retains paid features through the current cycle, and the account then returns to free features. | The individually researched database offers free listings and sortable yarn, fibre, designer, editor, accessory, and location views; the EU page spans multiple countries and direct seller profiles. | Ribblr's current ePattern manual documents line-by-line progress tracking, size-specific instructions, interactive charts, counters, attached media, stitch tutorials, unit handling, and left-hand display options. Its Ribbuild guidance says designers can create and test interactive crochet, knitting, and sewing patterns inside the platform. |
| Linked page reviewed | Jul 27, 2026 | Jul 28, 2026 | Jul 15, 2026 | Jul 21, 2026 |
| Next review due | Jul 27, 2027 | Jan 24, 2027 | Jan 11, 2027 | Jan 17, 2027 |
| Inspect | ||||
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