Hello Martin,

You can check the luggage policy depending on the carriers on the below link
https://help.raileurope.co.uk/article/41789-luggage-requirements
For a guide about stations for European cities, you can check the below link
https://www.raileurope.com/en-us/discover?utf8=%E2%9C%93&q=

For any other queries, you can contact our team via the below link:
https://www.raileurope.com/en-gb/contact/new

Regards,
Ankit,
Rail Europe.