Features: Crafted from stainless steel, the butterfly pin backs are rusts resistant, ensuring long lasted use for your lapel pins, service bars, and jewelry projects. Featuring a round disc base designs, these pin backs provide easy attachment for various embellishments, while the secure clasp ensures your creations stay in place. Suit for jewelry designers, badge collectors, and creative gift makers, these pin backs offer versatility and reliability for all your crafting needs. Perfect for creating custom brooches, badges, souvenirs, and unique accessories, these pin backs are essential tool in any craft enthusiast's collection. Elevates your handmade projects with these tie tacks, designed to enhances both the functionality and aesthetic of your handmade jewelry and decorative pieces. Specifications: Material:Stainless steel Size: 1:Approx.8mm/0.31inch 2:Approx.10mm/0.39inch 3:Approx.12mm/0.47inch 4:Approx.14mm/0.55inch 5:Approx.16mm/0.63inch 6:Approx.18mm/0.70inch 7:Approx.20mm/0.78inch 8:Approx.25mm/0.98inch 9:Approx.30mm/1.18inch Quantity:5pcs Package Includes: 5pcs Butterfly Pin Backs note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color about the item.