Methodology

1. Evidence scope

SizeRoute dataset 5.4.0 publishes only direct unit conversions, measurement designations and measurement guidance that can be explained and audited. Unaudited regional shoe labels, universal clothing-country formulas and generic accessory letter sizes were retired.

2. Exact calculations

Centimeters and inches use the exact relation 1 inch = 2.54 centimeters. Ring diameter and circumference use circumference = π × diameter. Displayed decimals are rounded only for readability.

3. Measurement designations

Mondopoint is shown as a foot-length measurement designation. The ISO ring designation follows inner circumference in millimeters. These designations do not guarantee the fit of a particular product.

4. Clothing

The clothing tool records a body-measurement profile and converts its units. It deliberately does not generate a universal S/M/L, US, UK or EU label because manufacturer cut, ease and grading vary.

5. Safety equipment

The helmet tool converts head-circumference units only. It does not recommend a generic letter size. The exact model chart, correct adjustment and a real fit check remain mandatory.

6. Data governance

Every active generated row has a source ID, evidence status, dataset version and review date in the downloadable row-level register. Reports are reviewed against that register.