The items that fit your Honda Odyssey (2nd Gen) are shown below.

In 1999 the second generation Honda Odyssey (RA6/7/8/9) was launched. The North American model is different to that sold in the rest of the world. 

Models with original navigation do not have room for a double DIN radio as the original radio is located in a single DIN slot just above the gear selector and the navigation/camera screen is where the radio is located on the lesser specified models.