9 beads set. Measurements are roughly 18 mm. Each is decorated with stringer work. These beads are etched, for a smooth sea glass finish. The holes in the beads are 1/8". All beads are made by myself in my own studio in Scotts Velley California. For my work I used Effetre (Moretti) – Italian glass, Reichenbach - German glass, Double Helix – American glass. All marbles are annealed in a kiln for durability. Colors may vary-the setting vary from monitor to monitor. Thank you for looking!