SmartSize can show shoppers metric (cm, kg) or imperial (in, lbs) measurements in your size charts and fit quizzes. To choose which system they see first, open Settings → General settings → Measurement unit and pick an option under Default measurement unit.
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The dropdown has three options:
Store locale (auto-detect) — the default. SmartSize picks the unit automatically from the language and region your storefront is viewed in: imperial for US and UK English, metric for everything else.
Metric (cm, kg) — every shopper starts with centimeters and kilograms.
Imperial (in, lbs) — every shopper starts with inches and pounds.
Pick your option and click Save in the bar that appears — the change applies across your whole store right away.
💡 Tip: this only sets what shoppers see first — they can always switch between units with the cm/in toggle inside the fit quiz and size chart. Not sure which to pick? Leave it on Store locale: US shoppers get imperial and international shoppers get metric, automatically.