A size chart linked from your footer is not a size chart your customers are using.
The customer deciding between a medium and a large is on your product page, looking at the size selector. That is when they need sizing information - not after they navigate away to a separate page and lose their place.
A popup size chart triggered directly from the product page puts the information exactly where the decision is happening. And the quality of that popup matters. A basic modal with a static image or a pasted table is better than nothing, but it is not the same as a properly formatted size chart that shows actual garment measurements, renders cleanly on mobile, and updates based on the product.
The right way to do it
Clean Size Charts handles this out of the box. Install the app, build your size chart with your actual measurements, and it places a size guide trigger next to the variant selector on your product page. The popup is mobile-optimized, supports per-product charts, and handles international size conversions if you sell into UK or EU markets.
Setup takes about 10 minutes. No Liquid edits, no theme conflicts.
Why it matters for returns
Customers who can confirm their size before buying return less. The fewer steps between "I need sizing info" and "I have sizing info," the lower your return rate on size-related issues.
If you want us to configure Clean Size Charts on your store or integrate it cleanly with your theme, submit a task request and we will get it done.