Picking up these cheeky pair of smiling hippos in the morning is always going to be a fun start to the day for any child. Made from 9ct yellow gold with a 375 metal mark, they have a face size of 6mm x 8.5mm, with a front to back distance of 6.5mm. With a pin width of 1mm and weight of 0.21 grams, these studs are fastened in place by a 7.5mm Andralok lever.