Cufflinks

It is not wrong to wear cufflinks with your suit, but not necessary. However, with a tuxedo, cufflinks are always a great idea. French cuffs are the ideal and favored choice for a tuxedo and ups the ante when it comes to formality.

See more about – Tuxedo Shirt vs. Dress Shirt: Everything You Need To Know

Plackets

The placket of the shirt is the narrow strip down the front where the buttons and buttonholes reside. This is one area where the difference between a tuxedo shirt and a suit shirt is made evident.

Tuxedo shirts can come with plackets that are meant to be worn with tuxedo studs (metal buttons that are inserted into buttonholes on both layers of the placket) or standard plackets with an extra layer of fabric covering the buttons (often referred to as a hidden placket).

The chest area adjacent to the placket on tuxedo shirts can also feature pleats or a bib front that doubles up the shirt fabric for an intentionally starched and stiffer look. Suit shirts do not have these extras, hence why they should never be worn with a tuxedo. 

Pocket Squares

A white pocket square is not only standard but really the best choice to wear with your tuxedo. However, with your suit, you can wear whatever you would like. This is the best place to interject some personality.

Collars

When it comes to tuxedo shirts there are two main styles of collars – wingtip and turn-down. The majority of the time, pair your tuxedo with a white turn-down collar shirt. According to formal standards, the only time you actually need a wingtip collar shirt is when wearing a tailcoat. With your suit, choosing a button-up shirt with a basic collar style is your best bet. 

Pants

Tuxedo pants, and sometimes suit pants as well, will also feature side adjusters. These are usually made of a metal buckle and fabric strip on each side that can be used to adjust the snugness of the fit. Or sometimes the pants will feature a button system that works with an elastic strip of fabric inside the waistband to achieve the same effect.