Features: Parts for making quality pin-back buttons. Lightweight, rustless, anti-corrosion, durable Smooth surface, easy to print pattern. Backs with pins inserted, easy to use. Included: 100 metal circle badge button shells. 100 circle pin backs. 100 pieces mylar. Perfect for DIY custom pin buttons, create unique homemade buttons. Perfect for name tags, business events, school events, appreciation days, holiday gifts, tourist souvenirs, ornaments for cloths, bags. Specification: Material: Tinplate Color: Silver Optional Diameter: 25mm/0.98in; 32mm/1.26in; 37mm/1.46in; 44mm/1.73in; 50mm/1.97in; 56mm/2.20in; 58mm/2.28in Quantity: 100 sets Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 100 pcs x Circle Badge Button Shells 100 pcs x Plastic Circle Pin Backs 100 pcs x Mylar (other accessories demo in the picture is not included.)