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| Decision field | Open accessPattern Grading & Size-Run Validation RecordGlobalRemove | Free + paidThreadloop Sewing Pattern DatabaseGlobalRemove | Free accountFOURSOURCE Supplier NetworkGlobalRemove | Open accessASDP Sewing Professional DirectoryUnited States · North AmericaRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Source production | Source production |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | Find patterns & fit |
| Area | Patterns & fit | Patterns & fit | Production | Production |
| Best for | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Searching current and out-of-print sewing patterns | Searching global apparel and textile production capabilities | Finding a US sewing or patternmaking professional |
| Know before using | The record does not create a production grade, supply universal increments or breakpoints, validate a CAD file or fit population, reproduce licensed standards, or replace qualified anthropometric, pattern, technical-design, fit, quality, accessibility, safety, statistical, and user-research review. | 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 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 member referral directory, not a Stitch Authority roster or approval. The observed result count can change and is not a practitioner census. ASDP states that it makes no representations, warranties, or guarantees and assumes no responsibility for members' products or services. Membership, a code of ethics, a profile, a patternmaking category, or stated referral availability does not establish identity, credentials, experience, current availability, capacity, insurance, price, accessibility, workmanship, file compatibility, schedule, or project fit. Confirm those points, references, scope, samples, terms, and remedies directly. |
| Practical access | ||||
| For | Apparel brands | Makers | Apparel brands | Both |
| Location or jurisdiction | Global | Global | Global | United States · North America |
| Access | Open access | Free + paid | Free account | Open access |
| Format | Stitch Authority | Community | Marketplace | Directory |
| Source type | Stitch Authority | Community database | Commercial marketplace | Industry organization |
| 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 guide cites current ISO body-table, size-designation, and garment-measurement boundaries plus two peer-reviewed studies that tested the relationship between conventional grade rules, anthropometric evidence, and garment fit; it requires product-specific target deltas and validation instead of publishing universal increments. | 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. | 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. | ASDP's public directory searches members currently accepting referrals by location and professional specialty. At the July 26, 2026 check, its Patternmaking & Related Services filter returned 15 opted-in profiles with specialties, service-location text, profile or contact routes, and some remote-service notes. The page identifies the population as association members in good standing. |
| Linked page reviewed | Jul 27, 2026 | Jul 28, 2026 | Jul 21, 2026 | Jul 26, 2026 |
| Next review due | Jul 27, 2027 | Jan 24, 2027 | Jan 17, 2027 | Jan 22, 2027 |
| Inspect | ||||
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