10pcs Waterproof Sew-In Magnets - N52 Neodymium Magnetic Snaps for Sewing
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The strongest sew-in magnets for clothing, curtains, bags, and any sewing project where you want a hidden snap. Each pack contains 10 N52 neodymium disc magnets — pre-coated and machine washable — that work as sewable magnets, stitch-in magnets, or hidden magnetic snaps for sewing directly into fabric.
Choose from three disc sizes (12mm, 20mm, or 25mm) to match the thickness of your material. The through-fabric pull of N52 is roughly 1.5× that of common N35 magnets, so closures stay shut without bulky buttons or visible hardware.
Project Ideas
- Sew-in magnets for clothing — invisible closures on jackets, shirts, vests, and adaptive clothing
- Sew-in magnets for curtains — keep panels aligned and gently closed
- Magnets for clothes & costume — hidden cosplay closures on capes, armor, and accessories
- Magnetic snaps for sewing — purse flaps, wallet folds, interior pockets, and bag closures
- Quilting & home decor — pillow flaps, cushion covers, table runners
- Crafts & fabric magnets — felt boards, soft toys, fabric organizers
Why N52 Neodymium?
N52 is the highest grade of neodymium magnet you can buy. These sewing magnets pull about 1.5× harder than standard N35, which is what makes them work reliably through the fabric instead of just on top. Each magnet is fully waterproof-coated, so the finished garment is machine washable.
Size Guide & Material Recommendations
Available in three disc sizes — Small (12×3mm), Medium (20×3mm), and Large (25×3mm). Use the chart below to pick a size that matches your material thickness.
| Material | Thickness | Small (12×2mm) | Medium (20×2mm) | Large (25×2mm) |
|---|---|---|---|---|
| Cotton T-Shirt | 0.012" | Good | Firm | Over-Powered |
| Denim / Jeans | 0.028" | Light | Good | Strong |
| Canvas | 0.04" | Light | Good | Firm |
| Leather (light) | 0.0625" | Gentle | Light | Good |
| Leather (heavy) | 0.125" | Weak | Gentle | Light |
What's in the Pack
- 10 sew-in magnets per pack — enough for 5 closures
- N52 neodymium grade — strongest grade available
- Waterproof coating — machine washable, won't rust
- Disc shape with smooth, low-profile edges
Pro Tip
Sew the magnet inside a small fabric pouch or between two layers of your project, then stitch around it. The magnet stays hidden and the closure is invisible from the outside. For thick materials like leather or upholstery, size up — see the chart above.
