Based on its recessional velocity of 3250 km/sec, about 145 million light years distant. Given that and its apparent size of 1.3 by 0.7 arcmins, about 55 thousand light years in diameter. In the images below, IC 2200 is the galaxy just left of center, while the one to its right is IC 2200A (the "A" referring to its being near a named object, namely IC 2200). (It may seem odd that Stewart did not observe IC 2200A when he discovered IC 2200; but there is nothing in his description of IC 2200 to suggest that he realized that it was accompanied by another galaxy; so perhaps as close as they are to each other, they simply appeared to be a single object.) The two galaxies are thought to be separated by only 80 thousand light years, and appear to have a common envelope of hot gases presumably expelled by their gravitational interaction. This interaction is also thought to be the cause of their slightly peculiar appearance. They will probably merge into a single galaxy within a few hundreds of millions of years.
     It should be noted that the presumed separation of IC 2200 and IC 2200A is not based on their "Hubble expansion" distances, as the difference between their recessional velocities is less than the normal random motions of galaxies relative to each other, in a given region of space. Instead, their estimated separation is based on the apparently common envelope of gas that they share. If they were much further apart in comparison to their size, they would probably have separate gaseous envelopes.

Paired with IC 2200, which see for a more detailed discussion and images of the galaxies. Based on its recessional velocity of 3240 km/sec, PGC 21062 is about 145 million light years distant. Given that and its apparent size of 1.3 by 0.9 arcmins, it is about 55 thousand light years in diameter.