Configure Size Guide button as a Floating button

1. Open SmartSize
2. Navigate to Settings on the left-hand side menu
3. Select Button display under "Size chart button" on the menu
4. Select Floating on page

If you have already enabled SmartSize's App Embed, you're all set!

If you have not yet enabled SmartSize's App Embed, simply click the Embed app in theme button and press Save on the top right corner of your Theme Editor.