8mm Round Natural Lava Rock & Gemstone & Shell Pearl Beaded Stretch Bracelets for Women Men, Size: about 2-5/8 inch(6.6cm) inner diameter, bead: 8mm.âPlease Note: These bracelets may include Natural Lava Rock & Flower Amazonite & Sodalite & Zebra Jasper and so on(as the picture shows). But as it is a mixed product, the stone type is delivered randomly, please refer to the actual product delivered.