Meet the Blue Collar Betty: a gold cuff style collar with a glossy finish. You can wear her solo to add a little rhythm to your look or really get the party started by adding any of our signature buckles. Necklace Type: Choker Available in two collar sizes Skinny collar: 3 mm Chunky collar: 4 mm Material: Gold finish-hypoallergenic brass core, 14k gold plating Collar only. Buckle pendants sold separately.