... that God loves us and wants us to be happy. -Benjamin Franklin-
I used Fantasy Flight green for the large cards and yellow for the small ones -- the same sizes as for Arkham Horror. They fit perfectly.
I tried the FF Standard American boardgame size (green label) - but they were a little too long for my tastes - I had a good 4-5mm of extra space at the top of the sleeve. Although there does tend to be quite a bit of variability between sleeves - between companies and even between packs from the same company!