Inner circumference: 17.5cm, beads 14.6mm-15mm ★Lightning-struck wood refers to wood split by natural lightning, usually jujube wood, difficult willow wood, or other weather-resistant wood. These trees are struck by lightning on rainy days during their normal growth process, becoming lightning-struck wood. ★The common belief among the people is that lightning strikes wood because it is the place where the heavens' lightning splits, and ghosts are deeply feared, making it a powerful object to ward off evil. Lightning-struck wood is considered the supreme sacred wood in Taoist magic and was used to create spiritual artifacts. 【Special Notes】 ★Photos taken with an iPhone by an amateur are posted as is. The color may appear slightly different from the actual item depending on your display. Please understand this beforehand. ★All of our products have not been appraised by an appraisal institution before being listed, and we do not guarantee items that are not marked as genuine. Please carefully examine the images to make your own value judgment before bidding. ★There are individual differences in how people perceive scent and beauty. If you are extremely concerned or have any doubts, please refrain from purchasing. ★Due to the nature of natural stones (wood), there may be differences in color, shape, and size, as well as inclusions, cracks, and small scratches. Please understand and acknowledge this. ★Returns and exchanges after purchase are not accepted. Please understand. For a pleasant transaction, please feel free to ask any questions you may have before purchasing.