I want to buy a silver needle for acupuncture. I don't know what to buy, thick, thin, long and short. What is the difference?

Generally, it is 1.5 inch, that is, 40 mm. The thickness of acupuncture needles is the same, except for fire needles, which are usually the same.

The length is different and the thickness is different. Basically, the diameter is about 0.2mm, and the commonly used 1.5 inch diameter is 0.2mm, like a 3-inch needle, it is 0.3mm, but the long needle is thicker, otherwise it is easy to bend, but as far as I use it, I can't feel the thickness of the needle on my hand.

If you buy needles, it is recommended to buy Huatuo brand. The price is high, but the quality of the needle is much better, and the needle tip and barbs are few.