I would say that if you are slim and wear jeans with appropriate accessories ie Tops,scarfs and jackets - well cut - (navy Blue or black) - not necessarilly for the younger generation - then you will look great and definitely should continue wearing jeans. Good luck.

As the late Dame Thora Hird once said, "Don't stop doing things because you're growing old, you'll only grow old if you stop doing things". I'm sure that includes wearing jeans - so forget the date on your passport and work that denim!

There does seem to be a notional age limit for jeans wearing - though I'm not sure that it's watertight. My theory is that if you look great in them, you keep wearing them, and don't let a soul put you off!