Zomentum provides you with a set of standard Units of Measurement (UOM) for products. You can edit or add more of your choice as per your requirements.
The following the steps can be peformed for editing or adding UOMs for products:
Click on the Settings icon on the left menu.
Click on Custom Fields.
Click on Products.
Click on More ellipsis on the far right corner of UOM and click on Edit.
On the editing window, click on the + icon to add new UOMs.
To delete existing UOMs, click on the trash can icon beside each UOM.
To reorder UOMs in the dropdown, hold and drag the hamburger icon on the left of each UOM.