1.9cm x 1.6cm x 1.0cm Approximately 2ml A magnet is attached to the back. If you do not want a magnet, please comment or refer to the page without a magnet. Due to being an overseas product, there may be some burrs or errors within 1mm. Please consult with us regarding individual sales or changes in quantity. We can prepare up to 100 pieces immediately. Individual sales start from 21 yen per piece + 250 yen shipping. Free shipping for orders of 100 or more pieces.