MicroMagnets by Zen Magnets – 2.5mm Neo Sphere Rare Earth Magnets (Neoballs) that don't suck
Neocube Magnet Ø5 mm, 216 Sphere Magnets
500pcs Tiny Mini Magnetic Magnets 1x0.5 mm Small Round Micro Ndfeb Imanes Diameter 1mm x 0.5mm Neodymium Disc Sensor Mini 1*0.5 - AliExpress Home Improvement
Ensign - 432 Micromagnets 2.5mm Tiny Magnetic Balls | Neoballs Marketplace by Zen Magnets
Work related stress has met its match in these shiny Zen magnets | Mashable