Making navmesh for actors to smaller radius?

this is the current nav mesh…
i’m having problems with it, because when my characters are set to “can affect navigation generation”

the characters radius are too big… that when characters go near each other, they look like they are repelling each other… unlike the 3rd pic below below

as you can see, because a character is in the middle of two static mesh blocks, no one can pass through it, even if there is clearly enough space …

the characters are 32x32 pixels anyway…

is there any way to make the radius smaller for characters… and the static mesh distance smaller?

they look nice when the "can affect navigation generation"s disabled…
but the characters bump and stop with each other when moving…

i need to make my nav mesh be able to support lots of characters like below…

Search for RecastNavMesh in World Outliner, and decrease Cell Size value in the Details panel.

can you add an image please to show where the option is