A lower wire gauge number means a thicker staple, while a higher shank number means a longer leg.
The most widely recognised standard for staple sizes reads wire gauge/shank length, such as 23/8, for example, where the gauge of the wire is the former, and the shank length (8 mm) is the latter.
37 54 31% OFF
300 450 33% OFF
65 82 21% OFF
139 200 31% OFF