The nine piece set are ideally used on the head, neck and chest areas, to refresh, revitalize the mind and spirit before the end of the hot & warm stone massage session. They are ideally used at room temperature as they feel slightly cooler than body temperature, so no additional cooling treatment is needed. White marble is popularly used for facial, neck and palm massage. They are particularly good at reducing puffiness around the eye area. It is advisable that these stones are not used on the bodies joints as they can encourage rheumatism. The Flat Ovular Shape is the most popular choice of stones used by therapists. The round, elongated shape fits perfectly in the palm of a therapist's hand, ensuring the stone is used efficiently. The rounded, narrower edges can also be used to pressurize and knead particularly tense muscles and areas during treatments. We use natural white marble rocks as the only materials, all stones were shaped and polished by traditional handcraft, giving you consistent quality in each and every stone, you will be able to offer deeper and more therapeutic stone massage. No wax, dyestuff, chemicals were applied during the production. • 1 Large ovular white marble stone (for the chest) 3.7" x 2.5" x 0.7"• 2 Medium ovular white marble pieces (for the neck) 2.6" x 1.8" x 0.7"• 6 Small ovular white marble (for the forehead, temples, face and head crown) 1.7" x 1.2" x 0.3" • Packed within blue velvet drawstring bag.• It's ideally used on the head, neck and chest areas for a cool stone massage, to refresh, revitalize the mind and spirit.