Customized Magnets, Circle 3 Diameter Magnet - Mailer & Stock Item, These circular stock magnets are ideal for promoting virtually any business, project or special event! Measuring 3 in diameter with a material thickness of approximately 0.020, these always-in-stock branding tools can be customized with your company name, logo and specialized message and sent as mailers to potential clients. A creative marketing idea for pizza shops, restaurants, sporting goods stores and so much more! ... #S120J $0.68/each.