Sorry Heidi, the "transfers" remark was my iggerance speaking. The roses are definitely proud of the surface and seem to be enamel (grey with white highlights).
I note what you say about the size. The 5" was a guess on my part, using my mobile phone as a ruler, then measuring it up afterwards, but I don't think I'd be more than 1/4" out with my guesstimate. Ho hum.
Ah well, that at least rules out something!