# Stitch Authority resource comparison

Generated: 2026-07-28T18:36:27.798Z
Comparison: <https://stitchauthority.com/directory/compare?ids=material-exchange%2Cgrading-guide%2Cyarn-database-eu%2Cpattern-testers>

This file preserves the published decision metadata for the selected routes. It is not a recommendation, provider approval, compliance decision, or record of project-specific due diligence.

## 1. Material Exchange

Permanent record: <https://stitchauthority.com/directory/material-exchange>
Source page: <https://material-exchange.com/>

- Primary job: Choose materials
- Area: Materials
- For: Apparel brands
- Location or jurisdiction: Global
- Access: Quote-based
- Format: Software
- Source type: First-party platform
- Linked page reviewed: 2026-07-28
- Next review due: 2027-01-24

### Best for

Evaluating an enterprise material-sourcing workflow after requirements are defined

### What the source establishes

Material Exchange’s current site presents an enterprise early-stage sourcing workflow and routes prospective customers to a demo. Its Sourcing Hub terms, last modified October 24, 2025, define invite-only registration, AI-assisted material discovery, sample requests, bulk inquiries, negotiation, order-defined service access, subscriptions, and supplier transaction fees. The same terms say Material Exchange cannot verify uploaded certificate statements.

### Know before using

The public site’s workflow, security, validation, and outcome statements are operator claims rather than independent performance evidence. The Sourcing Hub, Marketplace, and Digital Sourcing Platform have separate terms and must not be treated as one identical product. Supplier content, uploaded certificates, and AI suggestions are leads, not independent verification. Verify the exact product and Order, material identity and performance, certificate issuer and validity, supplier capability, samples, price, availability, commercial terms, data permissions, and any AI output before a sourcing decision.

### Account, payment, and exit

- Access scope: Business brand, supplier, manufacturer, or sourcing team considering Material Exchange’s current invite-only Sourcing Hub powered by Frank for early-stage material and supplier work.
- Before an account: Read the public workflow, security, and legal explanations and request a demo. The checked signed-out pages do not expose the live Sourcing Hub, supplier or material catalogue, configured feature scope, trial entitlement, or price.
- Free-account boundary: Sourcing Hub registration is invite only and managed by the Material Exchange team. An Order defines each organisation’s authorized service scope and term; the terms say some services may be free and trials may be offered, but the public pages do not promise either. Individualised logins may not be shared.
- Payment boundary: No public fee amount is disclosed. Orders or separate agreements define subscription and service charges; paid services may combine a one-time charge with automatically renewing monthly, quarterly, or annual charges. Orders are described as non-cancellable and non-refundable. Supplier transaction fees, sample shipping, scanning, customs, taxes, and separately negotiated services can be additional costs.
- Cancellation or exit: Users terminate through support, while paid-service exit can also depend on a separate agreement. The public terms say access can continue through the current term, there is no prorated refund, and renewal stops after termination; they also warn that account termination may destroy associated content. Confirm the required notice, receipt, final access date, and content-return terms in the Order before paying.
- Saved work and data: The Sourcing Hub can hold company and user details, sourcing briefs, supplier and material records, files, certificates, prices, compliance data, messages, samples, and detailed transaction records. Users retain ownership of submitted content, but termination may destroy it. The data notice covers personal-data access and portability and says residual copies may remain in active servers or backups; it does not document a self-service complete business-content export, format, or timing. Keep source files outside the platform and negotiate business-data return or export terms.

## 2. Pattern Grading & Size-Run Validation Record

Permanent record: <https://stitchauthority.com/directory/grading-guide>
Source page: <https://stitchauthority.com/guides/pattern-grading-explained>

- Primary job: Find patterns & fit
- Area: Patterns & fit
- For: Apparel brands
- Location or jurisdiction: Global
- Access: Open access
- Format: Stitch Authority
- Source type: Stitch Authority
- Linked page reviewed: 2026-07-27
- Next review due: 2027-07-27

### Best for

Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence

### 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.

### 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.

## 3. Yarn Database EU Dyers and Makers

Permanent record: <https://stitchauthority.com/directory/yarn-database-eu>
Source page: <https://www.yarndatabase.com/location/eu/>

- Primary job: Choose materials
- Area: Yarn
- For: Makers
- Location or jurisdiction: European Union
- Access: Open access
- Format: Directory
- Source type: Community database
- Linked page reviewed: 2026-07-15
- Next review due: 2027-01-11

### Best for

Finding independent EU yarn or fibre dyers with off-Ravelry purchase routes

### What the source establishes

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.

### Know before using

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.

## 4. Pattern Testers

Permanent record: <https://stitchauthority.com/directory/pattern-testers>
Source page: <https://patterntesters.com/>

- Primary job: Find patterns & fit
- Area: Patterns & fit
- For: Apparel brands
- Location or jurisdiction: Global
- Access: Free + paid
- Format: Software
- Source type: First-party platform
- Linked page reviewed: 2026-07-21
- Next review due: 2027-01-17

### Best for

Coordinating an independent sewing-pattern test

### What the source establishes

Pattern Testers currently offers application intake, tester selection, feedback, photos, approvals, issue tracking, revisions, a reusable tester directory, and release deadlines. The public pricing page shows a limited free plan and paid Pro and Business tiers. Its June 2026 privacy policy lists names, email addresses, measurements, photos, feedback, application history, and assignments among the data processed.

### Know before using

The interface and plan description do not prove tester reach, completion, feedback quality, fit validity, export quality, uptime, support, or suitability for an established release process. Measurements and photos can be sensitive personal data. Run a non-critical pilot, review the current privacy and service terms, define consent and photo rights, test exports and deletion, and keep pattern approval and release responsibility with the designer.

## Next checks

1. Remove any route whose audience, jurisdiction, access, or scope does not match the job.
2. Open the permanent record and source page for every remaining route.
3. Recheck facts that can change after the listed review date.
4. Verify project-specific capability, terms, test evidence, and legal requirements with the responsible source or provider.
5. Record the reason for the final choice outside Stitch Authority.
