These blue apatite palm stones are available in 3 sizes. Small measures approximately 1.75″ at its widest and weighs an average of 2.36 ounces. Medium measures 2″-2.25″ and averages 3.2 ounces. Large measures 2.25″ and weighs an average of 5.2 ounces. A stone will be intuitively selected for you from the size you choose. If you have a preference, let me know in the notes section and I’ll do my best to get that one for you.