In order to properly create a product with variations in the WooCommerce and then customize it inside Zakeke please follow the steps highlighted in this guide.

1. Create Global Attributes . Inside your WooCommerce admin go inside " Products" , then select " Attributes" and create one
   
   
   
   
2. Create a new product and in Product data select “ Variable product ”.
   In the Attributes section click on "Add Existing" as showed in the image below:
   
   
   
   

3. Click on " Save Attributes " and go to " Variations Section " and click on " Generate variations ":
   
   
   
   

4. Once you save the settings and the product you have created, you can go inside the Zakeke back-office and configure your own product.
   To do so please follow this guide here > Create a Customizable Product