These magnets are cut out of 1/4" wood (either birch or maple depending on quality of wood available). Stained in a water based color of either Milk Tea, Gray, or Golden Oak. The conversion chart is then printed with high quality UV cured ink. Due to the nature of the grains in wood and stain, magnets will all vary slightly. Comes with circle magnet attached to back. Measures 3.5" x 2"