Oval Natural Mahogany Obsidian Thumb Worry Stone for Anxiety Therapy,

Size: about 1.40 inch(35.5mm) wide, 1.79 inch(45.5mm) long, 0.33 inch(8.5mm) thick.

※Please note that the healing properties of gemstone is not scientifically proven , but gemstone therapy meditation may induce a placebo effect that helps you relax the mind.