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| Decision field | PaidPatternLab LondonGlobalRemove | Free + paidThreadloop Sewing Pattern DatabaseGlobalRemove | Free + paidYarnpondGlobalRemove | Open accessSeam Allowance ConverterGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Find patterns & fit | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Patterns & fit | Patterns & fit | Patterns & fit |
| Best for | Generating an editable custom-measurement block | Searching current and out-of-print sewing patterns | Running knit or crochet pattern tests | Translating a seam allowance already stated by a pattern or controlled specification |
| Know before using | A measurement-generated draft is a starting block, not independent evidence of body capture, comfort, mobility, balance, garment ease, or production fit. The result depends on measurement accuracy, supported ranges, formula assumptions, selected options, and output handling. Review the service's privacy terms before storing body data and sew a representative toile before design, grading, or production use. | 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. | The platform is for knit and crochet rather than sewing, and a profile, application, rating, or platform listing does not prove technical competence, availability, identity, or fit for a project. Prices and plan limits can change. Define the test or edit scope, sizes, yarn, deadlines, compensation, confidentiality, intellectual property, file handling, expected feedback, and dispute process in writing before work starts. | This is a unit-translation reference. It does not 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. |
| Practical access | ||||
| For | Both | Makers | Both | Both |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Paid | Free + paid | Free + paid | Open access |
| Format | Software | Community | Community | Stitch Authority |
| Source type | First-party platform | Community database | First-party platform | Stitch Authority |
| 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. | Knit or crochet tester, designer, sample maker, or tech editor using one role-specific workflow. | 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. | Browse public open testing calls and the provider's feature and pricing pages without signing in. | 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. | A free signup lets people look around, and testers participate without a platform charge. Designers and tech editors face different role boundaries. | 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. | Designers can pay per call or job, buy non-expiring credits, or subscribe monthly. Tech editors need a separate monthly subscription to apply for jobs. | 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. | The pricing page says monthly subscriptions can be canceled at any time, but it does not state when paid access ends or what happens to active tests or applications. | 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. | Designers can download pattern-test feedback as CSV or XLSX. The checked pages do not establish a full account export or deletion route. | Not yet reviewed at this level. |
| Source and review | ||||
| What the source establishes | PatternLab London's current drafting page says a user creates a measurement profile, selects a basic block or sloper, adjusts fit, dart placement, length, seam allowance, and sleeve options, then downloads the generated result as tiled PDF, AI, or SVG. The live catalogue names bodice, dress, trouser, and stretch blocks and displays a price before purchase. | 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. | Yarnpond's current pages let knit and crochet designers publish public or private testing calls, select applicants, communicate with test teams, set milestones, collect feedback, post sample-making calls, and advertise tech-editing jobs. Testers can participate without charge, while designers pay per testing or job post, use credits that the pricing page says do not expire, or use a monthly subscription that the page says can be canceled. | NIST states that one inch is exactly 25.4 millimetres, and the SI decimal relationship makes one centimetre equal to 10 millimetres. The tool uses those factors, 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. |
| Linked page reviewed | Jul 21, 2026 | Jul 28, 2026 | Jul 28, 2026 | Jul 28, 2026 |
| Next review due | Jan 17, 2027 | Jan 24, 2027 | Jan 24, 2027 | Jul 28, 2027 |
| Inspect | ||||
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