Collection: Neodymium Magnets

How to read the disc magnet size chart

The chart lists our neodymium disc magnets and cylinders one size per row, written as diameter by thickness. A 3 x 1 mm magnet is 3 mm across and 1 mm thick. Longer pieces such as 3 x 6 mm and 3 x 14 mm are cylinder magnets, and they sit in the same chart so you can compare them directly.

Prices are per pack, and the pack size column shows how many magnets each pack holds.

Metric and inch magnets

Millimeter and inch magnets are made to different dimensions, so they are listed as separate products with their own ratings. The chart does not convert one into the other. Use the Units filter to show metric sizes, inch sizes or both. Inch diameters run from 1/16 inch up to 2 inch.

How pull force changes with size

Pull to steel is listed in pounds. Thickness and diameter both raise it, and in this chart diameter raises it faster:

• 3 x 1 mm: 0.29 lb
• 3 x 3 mm: 0.72 lb
• 10 x 3 mm: 5.16 lb
• 25 x 3 mm: 14.05 lb

Tripling the thickness of a 3 mm disc gives about two and a half times the pull. Widening a 3 mm thick disc from 3 to 10 mm gives about seven times the pull. The bar beside each rating compares it with the strongest magnet of the same diameter.

Grades, coatings and temperature

Most sizes are N52 with a maximum operating temperature of 80°C. Three small sizes also come in N45UH, rated to 180°C: 1 x 0.5 mm, 1 x 1 mm and 3 x 0.5 mm. The maximum operating temperature is the highest temperature a magnet is rated to work at; past it, the magnet can lose strength for good.

Nearly every size has a nickel-copper-nickel (NiCuNi) coating. The 1.5 mm sizes and the axial 1 x 0.5 mm discs use zinc. For more on grades, see our magnetic grades page.

Sizing help and safety

For tabletop miniatures, our Warhammer magnet size guide matches magnet sizes to common builds. Before you order, read our magnet safety warnings.