Sources & Verification Log
Every conversion on this site traces back to a recorded source. If a source is missing, the build fails — that is enforced by code, not discipline.
Current sources
| Source | Kind | URL | Accessed |
|---|---|---|---|
| Shoe size — system definitions and conversion tables (reproduces ISO/TS 19407 relations) | standard | https://en.wikipedia.org/wiki/Shoe_size | 2026-10-09 |
| BlitzResults shoe size charts (retailer cross-check) | retailer | https://www.blitzresults.com/en/shoe-size/ | 2026-10-09 |
Verification notes
Shoe size — system definitions and conversion tables (reproduces ISO/TS 19407 relations): Scale relations: UK=3L-23, US men=UK+1, US women=common scale, EU=1.5cm+2, kids scales; AU men/kids=UK, AU women=US. Direct ISO/TS 19407:2023 purchase verification pending — tracked by the 6-month re-verification cadence.
BlitzResults shoe size charts (retailer cross-check): Agrees with the standard relations within one half size on US/UK/EU boundaries; disagreements are the reason all labeled-size conversions carry approx flags.
Changelog
- 2026-10-09 — dataset 1.0.0: initial dataset. 490 size entries across 13 systems, generated from documented scale relations; golden-value checks against published tables; cross-checked against one independent retailer chart. All labeled-size conversions flagged approximate pending direct ISO/TS 19407:2023 verification (tracked by the six-month cadence).
Re-verification cadence
Sources are re-checked every six months. Entries that fail re-verification are flagged or
withdrawn — never silently changed. Brand-specific tables (Phase 3) will be published only from
official manufacturer charts, each displayed with a "Source: