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Measurements reference

Guide type: Reference Difficulty: Intermediate Applies to: Body and garment measurements

A catalog of the measurements SmartSize uses in size tables and fit quizzes. Use this reference when building a size chart, filling in a quiz size table, or reviewing AI-imported data.

Measurement catalog

Measurement Body area Unit Size charts Fit quizzes
Bust / Chest Upper torso cm / in ✅ ✅
Underbust Under the bust cm / in ✅ ✅
Waist Mid torso cm / in ✅ ✅
Hips Lower torso cm / in ✅ ✅
Shoulder Upper back cm / in ✅ ✅
Arm (sleeve length) Arm cm / in ✅ ✅
Inseam Inner leg cm / in ✅ ✅
Neck Neck cm / in ✅ ✅
Height Full body cm / in ✅ ✅
Weight Full body kg / lb — ✅
Pet neck Neck cm / in ✅ ✅
Pet chest (girth) Chest cm / in ✅ ✅
Pet back Back cm / in ✅ ✅
Pet weight Full body kg / lb — ✅
Age — months — ✅
Head circumference Head cm / in — ✅

How measurements appear

In a size chart, measurements are columns in the table block. You enter the garment or body measurement for each size row. Shoppers read the table and compare their own measurements to find the right size.

In a fit quiz, measurements are columns in the quiz size table and questions in the quiz flow. Shoppers enter their body measurements, and SmartSize compares them to the table ranges to generate a recommendation.

Units

SmartSize supports metric and imperial units.

Unit system Length Weight Age
Metric centimeters (cm) kilograms (kg) months
Imperial inches (in) pounds (lb) months

The default unit is set in Global settings > Measurement units. You can choose Store locale, Metric, or Imperial. SmartSize does not convert between units inside a size table — enter values in the unit your chart uses. See Change the default measurement unit.

Notes and limits

  • The exact measurements available to a fit quiz depend on the quiz type and audience. A Prediction quiz always collects height and weight. A Precision quiz lets you choose the exact measurements from the catalog above.
  • Pet measurements appear only when the quiz audience is set to Dog or Cat.
  • Baby and kids measurements appear only for the relevant audience and product family.
  • Weight and age are used by the recommendation algorithm but are not typically shown as columns in a size chart table.
  • SmartSize rounds displayed values to one decimal place.