Steff991 said:I couldn't find a map of the Rhinelands real-life size or shape so I couldn't tell what provinces I should use. If you can find one then please let me know where you can find it. Many thanks.
Well, 'Rheinland' is a bit of an ambiguous term, which is used over the years to describe a whole range of specific areas in Western Germany. As far as your Rhineland Free State is concerned, the three Southern-most provinces would include the Weimar states of Baden, Wurttemberg and about half of Hessen (although part of the Saarbrucken province belonged to Bavaria!). Check here for the map of the Federal Weimar states: http://de.wikipedia.org/wiki/Bild:Deutsches_Reich_1925_b.png
For the actual 'Rhineland' bit, you're probably best off basing it on the Prussia's actual 'Provinz Rheinland': http://www.deutsche-schutzgebiete.de/webpages/Rheinland_im_Deutschen_Reich+.gif
You could also possibly add Westphalen if you really wanted to as well: http://www.deutsche-kaiserreich.de/