I have sleeved all the cards from the
Great Britain Expansion
I have also got the expansions, Railways of the future and Western US.
The cards in these are a little bit bigger and don't fit in the sleeves I use.
Has anyone else found this a problem.
I use the MTL sleeves 63.5 x 88
Welcome to Board Game Geek!
Here is a great list that collects sleeve sizes for a bunch of games:
If I recall correctly, I believe I used the SWN-510 for Railways... but I don't remember enough to be absolutely certain.
Hope that helps!