Neodymium magnets, 3mm diameter x 1mm thick, quantity 30. 3mm x 1mm are standard values. Actual thickness is approximately 0.7-0.8mm. There are individual differences in size. We will provide an estimate for your desired quantity. Please inquire. (Up to 5000 pieces depending on stock availability) Applications: Model making such as plastic models, crafts, etc. *Neodymium magnets may have scratches or dents from the manufacturing process. Please understand that these are within a range that does not affect usability. ◆Please use this product if you are 14 years of age or older. ◆There have been several serious accidents where children have swallowed these magnets and required abdominal surgery. To prevent accidental ingestion, please keep out of the reach of children.