How can I add a size chart button to the Craft theme?

[PageFly-Richard]

Hi @DogMom ,

This is Richard from PageFly - Landing page builder

For the Craff theme, this popup block is already available., I’d like to suggest this idea:
Step 1: Go to Online Store->Theme->Customize theme

Step 2: Product page->/Product infomation → Add this block

I hope it would help you
Best regards,

Richard | PageFly