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There is ROS package called costmap_2d. The costmap_2d package provides a configurable structure that maintains complete info about all position in the map in the form of a occupancy grid, which helps robot navigate.

Particularly for your problem, there is a parameter called "inflation_radius": default set as 0.55m. I am using ROS fuerte. In my system this parameter is found at: /opt/ros/fuerte/stacks/navigation/costmap_2d/cfg/cpp/costmap_2d/ in Costmap2DConfig.h

For more info, you should refer this link.

There is ROS package called costmap_2d. The costmap_2d package provides a configurable structure that maintains complete info about all position in the map in the form of a occupancy grid, which helps robot navigate.

Particularly for your problem, there is a parameter called "inflation_radius": default set as 0.55m. I am using ROS fuerte. In my system this parameter is found at: /opt/ros/fuerte/stacks/navigation/costmap_2d/cfg/cpp/costmap_2d/ in Costmap2DConfig.h

For more info, you should refer to the this linkcostmap_2d wiki page.