1. Inventory --> Configuration --> Settings:

2. Inventory --> Inventory Control --> Products

Find your Candle and on the Inventory Tab, add a package:

3. Create your Sale Order with the popup for each line:

After which you will see:

4. I have not seen how to expose this in Point of Sale, but there - your customer brings you a box of 12, right? :)

See also https://www.odoo.com/documentation/user/10.0/inventory/settings/products/usage.html

Hello,
I Think this is an important subject, the Multi unit of Measure is not working properly in Odoo especially when it comes to the POS app which has very limited options in this regard. In the master product from I think we have to have the ability to choose the units of measures that we need for this product, the barcode(s) for each unit of measure, and finally the price for each UoM for the product, all of this should be connected to the POS app. I've tried to use a customized POS app to fix this issue the don't give a sold solution for the issue, I think this should be fixed by Odoo themselves.

Hi Gregory

Is there any solution for services. We sell training courses and quotation are made by days or person, and we need to change them. according to the customer needs

Thanks 

Gregory, did you find a solution? Same problem here

First go to Sales settings and select(enable) Units of Measure : Some products may be sold/purchased in different unit of measures.  After that Sales configuration select Units of Measure and create additional unit of measure.

For example create Each as reference unit of measure for category unit and create Dozen(s) as additional unit of measure under category unit and type: Bigger than reference unit of measure and Bigger ratio : 12.00