These are actually plain buttons. I am selling them mainly to use as a glue on shank, Glue or soft solder these on the backs of cameos, coins, stones etc. Perfect for creating decorative sew on items for pillows, coats, sweaters. ...The pad size on these is 15mm. Solid cast metal with a silver tone plating. The top or pad is completely flat, makes an excellent gluing surface. The rim of the button measures 2mm thick, The overall shank height is 7mm, the hole to pass thread through looks like about 3mm in diameter. Sold in packs of 1 dozen.