the width of the widest point of the ring band: 13mm / 0,5 inches
the size of one rhinestone: 12mmx6mm / 0,4 inches x 0,25 inches
The size can be adjusted from about a size 5 1/2 (=about 16mm diameter) upwards. If you go smaller than that, the bands will overlap. If you're uncertain about the size and want more information, don't hesitate to contact me!