Essential Olivine Jade Massage Stone- Thick, Heavy & Smooth and Well-Polished Great heat retention to store the heat energy and stay hot temperature longer which is great for body fatigue relaxing The flat surface makes the massage stone close to your skin, deep relax your body, effective massage and warm your muscle. Easy using allows to be used for Spa massage Salon or at home. Perfect for common massage areas - neck, back, shoulders, arms and legs Specification: Material: Olive Jade Stones Size: 3x4cm/1.2x1.57 inch Package Includes: 5 Pieces Massage Stone Note: Please allow 1-2cm(0.4-0.8 inch) size difference due to measurement. We guarantee the style is the same as shown in the pictures. Thanks for your understanding and enjoy your shopping moment!