Size: Diameter 10mm x 20 sets These are snap-in magnetic buttons. I bought them to use for making mini pouches, but I didn't use them all, so I'm selling them ( ; ; ) I'm selling them for less than what I paid for them, so please consider purchasing them☆ I also offer a discount for bulk purchases. Please feel free to contact me. Although they are new and unused, Please understand that they have been stored at home before purchasing☆