I would say avoid clothes that are marketed 'for the older woman', such as 50+ etc. Why do designers want women 'of a certain age' to leap into nautical themed clothing as soon as spring comes around, and why must everything be blue? Capri pants, blazers and embroidered anchors? Not for me.
The good news, however, is that, for those of us whose waists are no longer as tiny as they were, this is a great time to buy clothes. The phenomenon of the overweight younger women (I'd hesitate to say 'bingeing ladettes') means that there are lots of pretty clothes around in sizes and styles which flatter all ages. And have you noticed how many trousers come with elasticated waists nowadays? No need to squeeze your self into anything.
It is no coincidence that clothes marketed for younger women nowadays come in larger sizes and are A-line, trapeze-shaped or just plain 'oversized'. Oversized shirts which dip at the back but are in colourful, draping fabrics flatter everyone. And there's no need to let one's hair go grey and add to our years.
In my mother's day, any mature woman above a size 14 was expected to wear tiny floral prints to minimise the hips and huge sailor collars to divert attention from a large bosom (remember the voluptuous Hattie Jacques?). Not so nowadays, however. Give me fuschia and magenta hued vests worn beneath black oversized shirts with see-though stretch lace sleeves, slim leg jeggings and diamante encrusted flatties, and watch me rock!