I look at these style guides, including the ones on GN whenever I feel like having a giggle. By the time we are old enough to be on Gransnet we are such a wide variety of sizes and shapes that no generic advice like that given here is likely to be of use to more than one in ten of us.
I am not overweight but I am pear shape and have little or no gap between waist and hip, so I immediately ignore any advice that includes a neat waistline like the wrap round dresses because anything emphasising the waist emphasises my bum, and for me, that is not a good look.
Then there is the LBD, I haven't owned one since I was about 20 when I realised that black and my pale, yellowy complexion do not go together. I got fed up with being asked if I was feeling unwell every time I wore black
I expect most GN members looking at the recommendations will have their own tale to tell.
I wear what I like and feel comfortable in and DD and DDiL have given my the thumbs up for being stylish. The clothes that best suit us are the ones we feel comfortable and confident wearing.