Darice MMAFG-12557 18-Piece Round Magnet with Foam Adhesive Go to amazon.com Related posts The 12 best adhesive magnets for 2022 Feature18 piece set3/4 inch sizeFoam adhesive DescriptionDarice's Round magnets come with foam adhesive. This set of round magnets have 18 pieces included. These magnets will be a great addition to your craft project.