This Red Jasper adjustable silver plated ring is adjustable to size 11 comfortably and measures a little under 3/4". There are several in stock, please be aware the stones will differ, as they're natural. Red Jasper sustains and supports through times of stress and brings tranquility and wholeness. Jasper provides protection and absorbs negative energy and balances yin and yang. Jasper clears electromagnetic and environmental pollution, including radiation.