How to A/B test size charts on Shopify?

Three options: (1) Tailor Size Guide built-in A/B test mode — splits traffic 50/50 between two chart variants, tracks add-to-cart + return rate. (2) Shopify A/B testing apps like Intelligems, Visually.io. (3) Google Optimize / GA4 experiments (free).

Start with placement (popup vs tab), unit defaults (cm vs inch), and visual style (table vs interactive recommender). The biggest wins come from changing display mode, not the chart data.

By Mohit Patel, Marketing Specialist, Tailor Size Guide

Shopify how-to June 16, 2026 4 min read

How to A/B Test Size Charts in Shopify

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Find the variant that converts. Three tools: app A/B mode, dedicated split-test apps, GA4 experiments.

What to Test

Display mode (popup vs tab vs sticky button), unit default (cm vs inch), input style (measurements vs body type quiz), placement (above vs below add-to-cart), confidence indicator ("true to size" badge yes/no).

Tracking the Right Metric

Add-to-cart rate is fast feedback. Return rate is the real ROI signal — needs 30+ days. Track both. The variant winning add-to-cart sometimes loses on returns (e.g., recommender that pushes everyone to size up).

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