At this point, go ahead and make sure you have some orders that include different variations of the product you have just set up. Now we can go ahead and export the data.
3.1. Click WooCommerce > Order Export + Pro. The WooCommerce Order Export and More screen appears.
3.2. Click and expand FIELDS TO EXPORT.
3.3. On the right pane, choose Line Items. The LINE ITEM META DATA drop-down menu now displays the attributes Color and Size.
3.4. Select them one at a time and click ADD FIELD to add them on to the left pane.
3.5. Drag and drop ALL LINE META DATA from the bottom of the right pane (highlighted in the following screen). The attributes Size, Color and All Line Metadata is now displayed on the left pane.