Dimensions: Clip button diameter is 58mm / 2.28 inches (. 2-1/4 inches), round clear film is 70mm / 2.76 inches (. 2-3/4 inches). Recommend using 70mm diameter 100gsm-157gsm Coated paper or colored inkjet paper Reasonable design: The shell and back cover are made of high-quality alloy to make the badge buttons more textured and stronger, and the high-quality plastic film protects the pattern while maintaining the luster of the badge. The metal button back cover has a longer service life than the plastic back cover and is not easily damaged Button bulk list: You receive 80 pieces of metal top covers, 80 pieces of metal button pin back covers, 80 pieces of round transparent film and 1 piece of gasket. Our badge blank button pins fit most 58mm / 2.25inch button making machines Wide range of uses: Using our metal button parts supplies set, you can make a variety of special badges, not only suitable for home, school, company, small business, exhibitions, events, attractions, but also can be used as name tags, souvenirs, personalized birthdays Gifts, holiday gifts, suitable for family, friends, classmates, teachers, colleagues. EASY TO USE: Our button making supplies are convenient and easy to use. First, choose your favorite picture paper with a diameter of 70 mm, then put the metal top, picture paper and plastic film into the mold of the button making machine, and them in sequence. Finally, place the gasket and metal button back cover into the mold and together with the front part.