All of our products are handmade. there may be minor differences. the length of our product is 40 cm and the extension rings are 3 cm. the beads we use are sand beads of 3 mm size. the extension chain does not darken in a long time. for longer use, please use perfume, water, alcohol, etc. keep away from materials. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.