Hello,
I checked the sample site you shared. That Size Guide layout is not coming from the default WoodMart Size Guide settings.
They are using a custom solution created with an HTML Block, where:
– A custom pop-up button is added on the product page
– The pop-up content is built manually inside the HTML Block
– Tabs/content for different measurement units are added using custom content
See Screenshots for better understanding: https://ibb.co/cc2xfG6c
Best Regards