Its diameter in the sky is about 23 arc minutes and its easy to view from a small telescope or binoculars. This image was taken with my small ETX-70 with no tracking composed of 40 shots of 2 seconds stacked with DSS, 10 darks and 10 bias.
Nearby is NGC 6207, a 12th magnitude edge-on galaxy located at 28 arc minutes in the north east which is also visible at the top of this image. If M13 being at 22,000 ly from us and being visible is awesome, knowing that this galaxy is at 30 million ly just blew my mind. Somewhere between M13 and NGC 6207 one can imagine a small galaxy IC 4617. Again, I'm fully satisfied with what it's possible with such a small telescope but not being able to track is starting to be a serious problem...
And again, the image annotated by astrometry.net:
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