These are a antique brass plate base metal filigree.Size is 40mm Considerably thinner then many filigrees. Very light weight, which is not necessarily a bad thing when making jewelry. They are thin enough to be bent easily. Lends them well to being glued to barrette backs and things like that where perhaps you want to have them conform to some shape. The cameo on the filigree is a 40x30mm filigree this just gives you an idea of size, you don't get the cameo you are buying the filigree.