For each bracelet sold, Essential Jewels will donate 10% of the purchase price to The Chiari & Syringomyelia Foundation Their mission is to advance knowledge through research and to educate the medical, allied sciences and community about Chiari Malformation, Syringomyelia and related disorders Bracelet is made with 8mm AAA grade Purple Dream Lace Amethyst and White Jade stones. Available in several sizes. To determine your size, measure your wrist with a fabric tape measure If you want a size that is not listed, please reach out to me, I will gladly make whatever size you request.