Two have stretch bands (the gold-tone ones with red); others are metal but open on buttom. Sizes: larger one with thinestones 11-1/2; smaller one with rhinestones 5-1/2; gold-tone metal plain one 6-3/4; silver-tone plain one 6-1/2. These other four are open on bottom so I imagine you could easily open or close them to make them larger or smaller but I don't want to fool with them. Sizes are approximate. Thanks for your interest.