These are buttons from a smock my child wore at daycare. Would these be useful as spares if you need them? There are three buttons with rims and three rounded buttons on the back, so the types are different, but the colors and sizes appear to be almost the same. They have been wiped with a disinfectant wipe, but since they were used by a child, there are small scratches and discoloration. Thank you for your understanding. Diameter: Approximately 1.7cm