Is a 22 gauge smaller than a 23 gauge needle?

Gauge is the term that indicates the diameter of the needle. Most commonly the needles that are used for medical purposed range from 7 Gauge to 33 Gauge, according to the Stubs scale. 7 Gauge needle will have the largest diameter while as the number increase, the diameter decreases. Therefore the 33 Gauge needle has the smallest diameter.

So a 26 Gauge needle will have a smaller diameter than that of the 18 Gauge needle.