The Swarovski round crystal button 3122 is a round crystal button with 2 center horizontal holes. The top and bottom of the button have equidistant facets around the outside of the button while the center of the button is slightly lower than the outside. (This button, while it lies flat, is slightly raised.) This button also has slightly large holes than the other crystal buttons.
For more information on how to sew Swarovski 3122 crystal buttons, please review the