these are 10 mm eggs with a 4 mm bead placed in th center. pretty easy to make. just poke a small hole thru the egg, and thread a bead on a wire. then feed the wire thru the hole you made and pop the bead into the center. pull the wire out and roll the egg to "seal" the bead in. just make sure you don't make the first hole too big or the bead will not stay in. I do these in 6mm eggs with 2 mm beads. I have some pics somewhere. ill look to see if I can find them and post for you guys.