What are the typical shelf overhang and nosing dimensions for a bookcase?

Commercial bookcase shelves typically sit flush with or slightly inside (1/4 in.) the front face of the side panels; there is no overhang on standard bookcases. The front edge of the shelf (the nosing) should be smooth, rounded, or banded to prevent injury. Some designer bookcases feature a 1/2 in. rounded wood nosing for a furniture-grade appearance. OfficeFurniture2go.com carries bookcases with quality edge profiles — call 1-800-460-0858.