Before publishing a chart
Define the measurement before presenting the number.
HBN: Size Charts gives each chart its own introduction, measuring guidance, units, columns, and rows, then displays the correct table inline or in a popup near the product's size choices.
Build from trusted measurements
State whether values describe the body or the finished product and explain where to measure. Measurement columns can switch units; text columns preserve labels such as XS, EU 38, or Wide.
Assign the chart deliberately
Use a storewide chart for one sizing system, exact products or collections for known groups, and ordered Pro rules for tags, product types, or vendors in a changing catalog.
Test which chart wins
Check representative products when assignments overlap. The simulator explains the matching order, and the optional size finder uses only the merchant's published ranges rather than inventing sizing data.