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I was skeptical, but apparently that is about right:http://www.slate.com/blogs/bad_astronomy/2014/01/01/moon_and_andromeda_relative_size_in_the_sky.html …
I checked before posting: ~100k light years across, 2 million ly away, meaning an angle ~100 k /2 m radians = 0.05 radians ~ 3 degrees. Moon is about half a degree, so about 6 moon diameters. Roughly as shown.
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For some reason it makes intergalactic travel/communication seem no longer so preposterous, since it’s “close enough” to appear that wide. But I suspect the real lesson is “galaxies are huge” relative to stellar systems.
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Wikipedia states that the Virgo cluster subtends about 8 degrees (so, much larger, even though it's much further away). And, of course, there are various large-scale structures; I wouldn't be surprised if some subtend a larger scale still, seen from Earth https://en.wikipedia.org/wiki/Observable_universe#Large-scale_structure …
End of conversation
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