These bronze singing bowls are all one of a kind and sizing is approximate - these are great for so many things! (Besides their beautiful tune) they are great for cleansing and tuning your crystals, stashing your rings, stashing crystals, burning incense cones or add your own ceramic square for sticks (make sure you put it on a heat safe surface because bottom will get hot). I also use these bowls for purification ceremony, when you have something you want to get rid of in your life, disturbing thoughts, patterns or feelings, write it down on a small slip of paper, hold a ceremony to banish it and burn the paper… gone! Size small is approx 1” diameter, medium = approx 2.5” diameter and large is 3.5” made of hand polished (yep, I polish these myself!) bronze - one of a kind