About HerSizeHub
Bridging the gap between confusing international sizing standards and the biological reality of women's bodies.
Our Founding Purpose
For decades, apparel, footwear, and lingerie shopping has been marred by an unspoken industry reality: **size numbers are largely arbitrary**. Across the United States, the United Kingdom, Canada, Australia, and Continental Europe, manufacturers utilize proprietary fit models and divergent grading formulas that vary wildly from brand to brand.
The consequence? Over 80% of women consistently wear the wrong bra size, suffer from foot discomfort due to mismatched shoe lasts, and struggle with international conversion charts that round haphazardly.
HerSizeHub was created to solve this through empirical mathematics. We replace retail marketing fluff with exact anatomical measurement algorithms, verified international conversion standards (ISO, SATRA, ACOG), and clear sister-sizing mathematics.
Our Core Sizing & Wellness Principles
1. Anatomic Accuracy Over "Vanity Sizing"
We do not inflate or deflate sizes to flatter or conform to outdated 1960s non-stretch manufacturing rules (such as adding arbitrary +4 inches to ribcages). Our algorithms reflect modern textiles and realistic body contours.
2. Evidence-Based Wellness
When we provide tools related to reproductive health or circadian rhythm sleep cycles, our formulas strictly adhere to clinical consensus from respected authorities including the American College of Obstetricians and Gynecologists (ACOG) and the Sleep Research Society.
3. Complete Editorial Independence
We do not accept paid brand placements to distort calculation results. When we review fabrics, cup styles, or footwear widths, recommendations are based purely on structural merit, durability, and ergonomic fit.
4. Respect for User Privacy
We believe your body measurements and menstrual cycle dates belong exclusively to you. All HerSizeHub calculations occur locally on your device in your browser; we do not store, profile, or sell your personal measurement inputs.
Our Research & Verification Methodology
Every article, sizing chart, and calculator formula on HerSizeHub is researched, authored, and audited by our dedicated HerSizeHub Research & Editorial Desk. We operate with an evidence-grounded editorial policy designed to eliminate retail guesswork:
- Primary Standards Synthesis: Footwear algorithms are cross-referenced with international standard ISO 19407:2015 and SATRA last guidelines. Ring sizing tools strictly follow ISO 8653:2016. Intimate apparel equations use anatomical ribcage differentials rather than retail marketing additions.
- Clinical Consensus for Health Tools: Cycle and sleep tracking tools are based on published clinical consensus from the American College of Obstetricians and Gynecologists (ACOG) and the National Sleep Foundation. We do not claim individual physician review unless a licensed medical provider has formally reviewed the specific material.
- Empirical Recalibration: Sizing charts and regional conversion tables are audited biannually to reflect changes in international apparel grading and sizing harmonization standards.
- Transparent Corrections: If an error is detected in any chart, formula, or article, we correct it promptly with a visible update timestamp.
- Educational Limitations: All sizing recommendations provide an informed starting baseline; individual garment fit depends on brand lasts, fabric elasticity, and personal physical comfort.
Contact Our Editorial Desk
Have feedback on one of our calculators or want to suggest a new tool? We welcome your thoughts at support@hersizehub.com or via our Contact Page.