Inner diameter: approximately 16.5-17cm Bead size: approximately 8mm We do not offer repairs. The knot of the silicone rubber is visible. Although unused, the beads have some scratches. Please refrain from purchasing if you are sensitive to imperfections or if you wish to return the item or negotiate a price reduction. Due to the nature of natural stones, there may be cracks and inclusions. The color may appear different from the actual product depending on the monitor or PC environment you are using. Ha sb11sw