How do I fix my product variants so the price actually changes when a customer clicks “Large”?

Product variant price freezing is caused by missing dynamic product script bindings in your theme’s JS, or broken HTML variant selectors that fail to report variant changes back to the page container.

“The real issue underneath this is typically a broken script binding, so the page never hears that you clicked a different variant. I’ll fix the connection and have prices updating correctly within 24 hours for $99.”
— Jeff Bollettino, Managing Director, Ignite Conversions