At the very beginning of your career, it can be hard to pick acupuncture needles. After all, there isn’t a type of needle that’s just better; instead, there are several types of needles, and varying degrees of quality within those types. Moreover, needles vary considerably from material to material, brand to brand and size to size, even if they are of the same type. Some factors to consider when choosing needles are their resilience, size, and sharpness, as well as their expiration date and their type. Covering all of these aspects would be too ambitious for a single blog post, so we’ve chosen to zero in on three of these aspects: we’ll first look at the most popular different sizes, then give you two tips on how to test needles for sharpness and resilience.
Acupuncture needle sizing involves both the diameter and size of the needles, and it is usually written using either or both the metric system and the tsun system in Canada, and the imperial system in the United States. One tsun corresponds roughly to one inch. For example, 0.18*13mm or 0.5 inches, half tsun is an extremely popular size of needle. Here, 0.18 means the diameter of needle is 0.18mm, and 13 means the length of the needle is 13mm, not including the handle.
0.18*13mm (0.5 inches, half tsun)
This size is most commonly used for facial acupuncture. The needle is very thin and short, significantly reducing pain during insertion: as they are short, they can be inserted rapidly and precisely, and their tiny diameter makes them almost painless. ShinLin, Zagu and Acu Relaxo are some examples of brands that have needles measuring 0.16mm in diameter with 13 mm length, which are better suited to very sensitive patients, or for more sensitive areas.
0.25*25mm (1 inch, one zen)
One of the most popular sizes of needle, it is suitable for a large number of different parts of the body, especially for shallower insertions. Though 0.30*25mm is a bit thicker than 0.25*25mm, it is easier to insert. Needles with 0.25 diameter are thinner and softer than 0.30, and therefore, they will be both less painful and more difficult to insert with precision.
0.30*40mm (1.5 inches, 1.5zen)
This very popular size of needle is suitable for different parts of the body with thicker muscle groups or acupuncture points needing deeper insertion. Because 1.5 inches is a bit longer, needles with smaller diameters will bend easily, and require dexterity and experience. Some practitioners will choose to use 0.35*40mm diameter needles to avoid bending; though easier to insert with precision, their larger diameter can cause pain. If you have excellent dexterity, then, ultimately the 0.30 diameter needles will be a better fit; however, you otherwise want to strike a balance between the potential length of insertion and its potential for pain.