What about these for custom Brawn heads? They are Playmobil people heads. Anyone know what diameter they are? Does anyone know whether they would fit over Hound's head? Maybe fill it in with some putty? What does anyone think? Hound's head is very small. There is a great range of Lego helmets of diameter 10mm, but Hound's head is 12mm diagonally. They might even do, with some filing down.