This strand of interlocking Czech glass beads is called "SNAKE" trade beads because of its similarity to the snake vertebrae. They date back from the early 1900's. These beads have been molded and have a beautiful brown color. They work great as spacers. The beads are about 9.5-10mm in diameter, and tones may vary slightly. Some beads may be chipped or show some small imperfections due to age. The strand can be worn as is because it is long enough to slip over the head. You can also use these beads as spacers in your own beaded creations.