Why Facebook's own advice on Group cover photo size is short-sighted
So three days after a sneaky, unannounced change in Facebook Group cover photo dimensions Facebook finally gets round to changing the advice in their Help Center (sic). Sure enough, Group cover photos created in their newly-recommended
30 Nov 2017 ... Facebook suggests using a bizarre 1.91:1 aspect ratio for Group covers. We've tested the more logical 16:9 and we reckon it's a lot better.