This set of 4 playful badges is a must-have for book lovers! They look even cuter when worn together. Sizes are: Large - approximately 3.2mm in diameter, Small - approximately 2.5mm in diameter. There is some discoloration and tarnishing on the metal parts. There is also a little bit of rust inside. Please be aware of this if you purchase. Those who are sensitive to these issues should refrain from purchasing.