aliensrcooluk at yahoo.co.uk wrote: Well 5.25" was the more common, used on just about everything. Looking at the one currently sitting on the desk, though, I believe that the magnetic disk itself *is* 5" in diameter, although the jacket's 5.25" (or rather just a shade under). 5.25" is the common terminology - but you could probably argue that 5" is equally correct :-) I'm not sure what their capacity was, but I'd guess at somewhere around 300KB. I suppose at the time that was large enough to be useful given the supposed advantages of the small physical size. But yes, they are fiddly - and more importantly they don't look particularly robust. That'd be brilliant! cheers J. -- If you've ever wondered how you get triangles from a cow You need buttermilk and cheese, and an equilateral chainsaw