Below you can see the front-view size comparison of the Ricoh WG-50 and Kodak Astro AZ651. The Kodak Astro AZ651 is clearly the smaller of the two cameras. Its body is 123 mm narrower, 62 mm shorter and 30 mm thinner than the Ricoh WG-50.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.