Based on traditional wisdom on how qi, or energy, flows through the body, these acupressure rings are designed to stimulate a pressure point between the thumb and forefinger believed to support relief from minor, occasional headaches. As for size: Small works best for children and smaller women, medium is a good fit for most women and smaller men, and large is best for most men and women with larger hands. And if you’d like to use them for acupressure on the feet, size up.

• Stainless steel