Quality MATERIA: The blank pins are made of clear sturdy acrylic, no abrasion, not friable, individually packaged.design a button photo buttons pinsREUSABLE: These clear buttons can be applied repeatedly, design your own inserts and print them out to create your own personalized button; You can change different style as you like pin button blank pins buttonsPACKAGE INCLUDING: 30Pack buttons pins with safety pin(including 30 front and 30 back) , size is 6 * 4cm/2.4 * 1.6in(diameter and thickness), can insert in 5.4 * 0.02cm/2.1 * 0.008in photo/paper/logo. Standard size for you better to EASY TO USE: make your own buttons can be assembled without a machine, you just need to put your picture, photo or logo between 2 covers and close the button tightly by hand, lastly tugged on the pin to check if they were ped together.WIDELY APPLICATION: Customize your button, make memorial pins for your friends and co-worker; They are suitable for making buttons crafts, photo buttons, school projects, and serving as wonderful gifts on birthday party and wedding.