【Contents】 S-rank stones (microparticle polishing) Approx. 4.7cm x 6.7cm: 4 pieces Small stones approx. 3cm x 4cm: 8 pieces Total: 12 pieces These stones are easy to hold and handle, with a size that fits comfortably in your hand. This versatile set of basalt stones can be used on various parts of the body. The gentle warmth spreads, supporting a relaxing time. Recommended for daily self-care and relaxation. Key Points! Hot stones are not just "warm stones." Due to their density and heat retention, they provide a sensation of comfortable warmth that penetrates deep. About the Stones Basalt is a natural stone formed by volcanic activity and is excellent at retaining heat. Therefore, it has been used in many cultures for healing and rituals since ancient times. Please experience the texture and warmth unique to natural materials.