Men's Natural Stone Bracelet Inner Diameter: Approximately 6.5cm Inner Circumference: Approximately 17cm Dragon-carved Onyx (12 & 14mm), Rutile Quartz (10mm), Onyx (8mm), etc. Made with elastic rubber, so it stretches! Due to the natural materials, there may be crystal formations, patterns that look like cracks, or indentations. Please understand this before purchasing. *The actual color may differ slightly from the image due to lighting conditions. Please be aware of this.