The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third.

The base is small and quadrilateral; its superior surface presents two facets, a large one medially for articulation with the hamate, and a small one laterally for the capitate.

On the radial side are two oval facets, for articulation with the third metacarpal; and on the ulnar side a single concave facet, for the fifth metacarpal.

See also

• Metacarpus
• First metacarpal bone
  First metacarpal bone
  The first metacarpal bone or the metacarpal bone of the thumb is the first bone of the thumb. It is connected to the trapezium of the carpus at the first carpometacarpal joint and to the proximal thumb phalanx at the first metacarpophalangeal joint....
  
  
• Second metacarpal bone
• Third metacarpal bone
  Third metacarpal bone
  The third metacarpal bone is a little smaller than the second.The dorsal aspect of its base presents on its radial side a pyramidal eminence, the styloid process, which extends upward behind the capitate; immediately distal to this is a rough surface for the attachment of the extensor carpi...
  
  
• Fifth metacarpal bone
  Fifth metacarpal bone
  The fifth metacarpal bone is the most lateral metacarpal.-Surfaces:It presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal.On its ulnar side is a prominent tubercle...