I never heard of any such rule. 🤷♂️
It is also a rule that you can't wear white after Labour Day, and that you can not wear brown in town.
In my opinion, all the 'rules' of #menswear are to be taken with a grain of salt.
I would say look at Ethan Newton for inspiration.
He knows how to get the right fit for a larger frame.
A good pair of trousers go a long way. Maybe Fresco or Seersucker? (Loro Piana makes a lovely wool/silk seersucker, and Ambrosi makes a good pair of trousers)
I would skip the braces if you...