It depends on the size of the comics and how they're bagged and boarded. Usually, you can fit around 150 to 200 standard-sized comics.
The number of bagged and boarded comics that fit in a long box varies. Factors like the thickness of the bags and boards, as well as the size of the comics, come into play. Generally, it could be anywhere from 120 to 250.
It's hard to give an exact number. Different comics have different dimensions, and the quality of the bags and boards can affect the space. But a rough estimate would be around 180 to 220 bagged and boarded comics in a typical long box.