Returns & CX Apr 14, 2027 6 min read
How to Measure the ROI of a Size-Guide App
ROI calculation for size-guide apps. Before/after install: return rate, conversion rate, customer feedback. Multiply impact × baseline volume = monthly $ savings.
The Chart
| Metric | Calculation |
|---|---|
| Return rate baseline | X% of orders before install |
| Return rate after | X% of orders after install |
| Reduction | Old % - New % = X pp |
| Returns avoided per month | Reduction × monthly orders |
| Cost per return | $15-30 (shipping + processing + lost margin) |
| Monthly savings | Returns avoided × cost per return |
| App cost | $8-35/mo |
| Net ROI | Savings - App cost; usually 10-50x |
FAQs
How long before measurable impact?
1-3 months. Returns lag the purchase by ~2 weeks. Need at least 2-3 months of post-install data to see clear pattern.
Other ROI factors?
Conversion lift (5-10% from better confidence), lifetime value (better fits = repeat customers), reduced customer service volume. ROI calculation often understates actual benefit.
Need this on your store?
Tailor Size Guide ships pre-built size charts for Shopify.