I have the red and green ones. I used to use them alot. But I don't like using tape.

I now have quilted knitting needle holders with 3 very strong 1 inch neodymium mags in them in a row. I sewed them in myself. This is tricky since they tend to knot up..so I put a nylon stiffener in with with them. I bought the knitting needle covers at a clearance store (they are folded in half too so are only 7 in long). These I lay over various nerve paths to intercept pain. They are so strong I only need them 20 minutes or less in a problem area.
The polarity is also confusing...I find some days I need one polarity and others the opposite works better.

If you search PN for "magnets" you'll find my posts. I don't often give advice on them, because the user has to be careful with them, and be trustworthy to keep them safe, away from pets and children who might swallow them.

I had a boulder roll onto my foot years ago when we were fixing a rock wall, and it crushed my big toe. My little magnets then, were very helpful for controlling the pain. My podiatrist was impressed, as he sometimes recommends them too.

This is the green/red ones:
http://www.amazon.com/Neodymium-Magn...coated+magnets
The price has sure gone up. I got 8 for about $9.00 years ago!

This is the size I sewed up into my pads:
http://www.amazon.com/Applied-Magnet...coated+magnets

I've been using magnets carefully for over a decade!