This solid rod implosion marble measures 1.51 inches in diameter. I was very excited with this way these milli looked after encasement.my wife said they looked like tube worms 🪱 so I went with that description 😂. The milli all hand made by me using jet black, royal jelly, tele magenta, purple amethyst, slime and pixie. It’s backed with amethyst and blue stardust. Includes 3D printed marble stand “colors very” and free shipping on web site orders.