Evidence & data governance
Brand & Sizing Data Methodology
This page explains how we collect, check, and update the brand sizing and product data used across the site.
Our basic rule
Where our facts come from, ranked
- Straight from the brand: official size charts, current product pages, fit guides, labels, or spec sheets.
- A retailer reproducing the brand's info: we use this carefully, only when we can't get the direct source, and we always note where it came from.
- Our own hands-on inspection: if we ever do this, we'll keep it clearly separate from brand claims and publish exactly how we did it.
What we record for each product
| Category | Examples | Our rule |
|---|---|---|
| Identity | Brand, product, sizing family, source link | Has to point to the exact source. |
| Sizing | Label, underbust, bust, band/cup equivalent | Only recorded when the brand actually publishes it, or it comes from a documented formula. |
| Construction | Strap type, closure, padding, seams | We don't guess from photos alone unless we've actually inspected it. |
| Material | Fabric wording or composition | We don't invent percentages from marketing language. |
| Use | Everyday, school, sports, support level | We separate what the brand says it's for from our own use-case tags. |
| Source info | Where it came from, when we checked it, notes | Required so anyone can trace where a fact came from. |
How we keep things consistent
- We keep brand size labels exactly as the brand published them.
- We don't convert letter sizes into band-and-cup sizes unless the brand itself supports that conversion.
- Measurements stay in their original units — we don't quietly change the number, just how it's displayed for comparison.
- A chart for one specific style stays specific to that style — we don't stretch it into a universal brand-wide chart.
- If two sources disagree, we go with the stronger, more current one after double-checking — and we review the mismatch before trusting any tool that depends on it.
How cross-brand comparison actually works
Our comparison tool checks the same underbust and bust measurements against each brand's own system — it doesn't just match one label to another. What you get is a starting point, not a guarantee of fit. The actual product chart and the 5-point fit check still have the final say.
When we don't have enough information
Unknown stays unknown. We won't guess a cup size from a generic letter label, guess fabric percentages from a fabric name, or count an unverified detail toward a Finder match. If a product doesn't have enough verified information, we either leave it out of a tool or clearly flag the gap.
How we handle "last checked" dates and rechecking
Every record has a date we last verified it. That means we checked the source on that date — it doesn't mean the brand hasn't changed anything since. We recheck records when someone reports a mismatch, when a brand updates its chart, or before we use a record in an important new comparison.
What happens when something changes
When a brand updates a chart, the new version replaces the old one. We review anything that depended on the old numbers. Bigger corrections go through our Corrections Policy. We don't knowingly keep showing outdated sizing as if it were current.
How this data is organized behind the scenes
We keep three separate sets of records: brand-level sizing context, the product details used across profiles, the Finder, and comparisons, and the individual size rows and formulas used by our sizing tools. Keeping them separate means an update to one doesn't accidentally change another.
No paid influence on recommendations
Sponsorships, retailer commissions, and product price don't earn a product any extra points in our similarity matching. Matching is based only on the documented details covered in our recommendation methodology, and sizing is always kept as its own separate, measurement-based step.
Related: Size Database · Recommendation Methodology · Source Standards