...
If you're using a zoned layout for your product pages, just add the Product Unit of Measure widget to your Product Detail page (if it's not there already!).
- Navigate to Content → Standard Pages.
- Select the Product Detail template.
- Locate the appropriate zone according to your layout (in our case, it was the Main Right zone, where price is displayed) and click Add Widget.
- Search for the Product Unit of Measure widget and click Add Widget.
...