How big are Nerf gun cartridges?
If this question is referring to the actual brand 'Nerf' there
are two different things it could mean: 1.The DARTS
2.Cartridges that you put the darts into before firing them.
Option #2 can be immediately answered because Nerf does not use
cartridges for their darts.
The darts that Nerf produces vary slightly in size because of
the different tips that accompany them, but are roughly 1cm in
diameter and 5.5cm long.