Sizing Methodology & Mathematical Logic

1. High-Precision Unit Conversions

All internal calculations maintain floating-point precision using the exact international metric definition: 1 inch = 2.54 centimeters. To prevent drift when users toggle back and forth between units, values are converted directly without compounding rounding errors. Rounding occurs solely at the presentation layer (displaying imperial values to 2 decimal places or clean fractions, and metric values to 1 decimal place).

2. Discrete Table Lookups vs. Artificial Formulas

Apparel manufacturers do not grade garments using continuous mathematical equations; they cut patterns in discrete size brackets (e.g., W27, W28, W29). Our engine maps your physical measurements against published brand tolerance brackets. If your measurement falls outside the manufacturer's tested limits, we explicitly flag the result as “out of range” rather than guessing.

3. Proportion Discrepancy & Conflict Detection

Most human bodies do not match standard hourglass mannequin ratios. When a user's waist points to one size (e.g. W26) and hips point to a significantly larger size (e.g. W30), generic calculators silently average them to W28—resulting in jeans that pinch the hips and gap at the waistband.

Our algorithm detects multi-point anatomical divergence and flags a Conflict Status. It explains the gap issue clearly and advises whether to size up for hips, choose a designated Curvy Fit line, or select denim with 2%–4% elastane stretch.