Set of 120 magnetic pins. 30 each of red, blue, white, and green. Dimensions are 4mm diameter by 10mm length. Perfect for holding papers on any magnetic surface. One magnet holds up to 6 pieces of paper. This magnet set complies with the regulations and labeling requirements of the Consumer Product Safety Commission. In addition, in accordance with Amazon strong magnet policy, these magnets are not made of rare earth metals and have a flux less than 50 kG2mm2.