Sources & Standards
The industry standards and practices that inform our size conversion algorithms
Industry Standards
Footwear: Based on Mondopoint alignment and international shoe sizing standards. We use foot length in millimeters as the canonical measurement.
Rings: Aligned with ISO 8653 standards for ring sizing, using inner circumference in millimeters as the base measurement.
Apparel: Derived from widely-used retail size mappings and body measurement standards across different regions.
Brand Data Sources
Brand overrides reflect commonly published differences for mainstream product lines. We continuously monitor official brand size guides and customer feedback to maintain accuracy.