Now that I've made a silly bit of writing trying to describe something I am sure has a simple name for, that's what I've been looking for.... A few in bronze, one in iron, and one in red-bronze (Sort of looks like copper) its size would be to fit into a 9cm vase opening with about a 30cm across in total. I'll have to see if I can find a online photograph of one so I'm sure we are "talking" about the same thing and the same sizes...
Now that I have managed to fully confuse myself in trying to describe this "thing" and about how large it must be.....