Description: Made of 100% natural green agate, the color of the roller is very nice. Real jade feels heavy and is naturally cool when you touch it. Perfect for massage. This guasha boards have smooth edges with a surface that will never scratch and hurt your skin or cause bleeding. The highest quality Gua Sha massage tools for actual and immediate pain relieve. Gua means to scrape in the Chinese language while Sha means a reddish skin rash. In Gua Sha, painful spots in the body are identified via acupressure or acupuncture points. Then, special Gua Sha instruments are used to scrape the skin in strokes. This guasha jade works great on neck, face, back hand, wrist, shoulders and foot. Offer you the most massage therapy. Specification: Material: Agate Jade Color: Green Size: 01, 02, 03, 04, 05 approx. 01 10.9x5.5cm/ 4.3x2.2inch 02 11x3.4cm/ 4.3x1.3inch 03 9.5x5.5cm/ 3.7x2.2inch 04 10x5cm/ 3.9x2.0inch 05 8x5.4cm/ 3.1x2.1inch Package Includes: 1 Piece Agate Jade GuaSha Scraping Massage Board Note: Please allow 0-3mm error due to manual measurement, thanks.