I love snap buttons. Collect as many as you desire and then change out the look of your bracelet or earrings whenever you wish! Just snap the button out and snap in another! It's simple and so much fun!
 
The wonderful thing about snap buttons is that most of them aren't just flat. They're dimensional!  This one has beautiful fuschia sparklies with an AB crystal cabochon in the middle.
 
20mm alloy snap charm button fit snap button bracelets/earrings. Knob size 5.5mm.