Matching your pocket square and tie or bow tie is a definite no-no if you want to consider yourself a well-dressed man.
Your pocket square and tie or bow tie should not be made from the same cloth. A pocket square is supposed to complement and bring contrast to your outfit. It is better to match a colour of your pocket square to a colour of your tie.
Solid black neckties and bow ties are the most formal ties, followed by solid white or ivory ties. For formal weddings that aren’t quite black tie, choose those 3.25- to 3.5-inch standard ties. Typically, the skinnier the necktie the less formal the look.
When not to wear a pocket square?
If you are wearing a blazer and chinos or a two-piece suit then the choice between adding a pocket square largely depends on how casual the overall look is. If the top and shoes lean towards formal, then a pocket square can be introduced. If you’re wearing a t-shirt and trainers, then it’s advisable to leave it out