Data Feeds

In data feeds, i not only want to export the product code, brand etc. but also the sizes of the products which are active.

Is this possible?

You can export all options and their variants with the Options field.

If you want to export only available combinations, additional code modifications are required.

Would you possibly share with me which file(s) should be modified?

Actually Data feeds module uses schema of the default Export/Import feature:

app/schemas/exim/products.php

You can start from extending it according to your needs

Thank you very much, i will try to.

You are welcome! If you need to extend Data Feeds functionality, feel free to contact us