Amazon.com: Baosity 30 Pieces Extra Large Dual Brooch Pin Back Base + Hair Clips DIY Brooches and Hair Jewelry Findings - 20mm/25mm/30mm Diameter - 30mm : Clothing, Shoes & Jewelry
Amazon.com: 50Pcs Silver Tone Pin Back Clasp Bar Pins Brooches for Craft 32mm (3 Holes) : Arts, Crafts & Sewing
Brooch back, glue-in, antique silver-finished "pewter" (zinc-based alloy), 35.5x29.5mm single-sided oval with textured edge with 25x18mm oval setting. Sold per pkg of 2. - Fire Mountain Gems and Beads