Einon is about right. 28mm = 1/65, 25mm = 1/72. The problem with these exact conversions is that GW oversizes everything (the so-called 28mm \"heroic\" scale), so no matter what you do things are going to look a little strange. This is most demonstrable by matching gun barrel sizes. Compare a GW tank\'s main gun barrel with some WWII tank like a Tiger or Sherman; you\'ll notice the barrels are grossly oversized in 28mm scale. Forgeworld stuff is actually scaled a bit more rationally, most noticeable in the Elysians and Death Korps. You should be able to find some 1/65 scale stuff out there; not a whole lot, but some.