10 mm. Made in Japan, these beads have an eyepin made of brass. The eyepins have a nice patina that varies from bead to bead.These glass beads have a lovely green swirl pattern. You can open the eyepin and attach them to any design or clip the eyepin and use them for a stringing project. Really pretty! Steal of the Week - $8.50 value for only $5 this week!