Here are some hints and tips when it comes to choosing mens formal wear:
Black is considered the most formal of colours for suits and is most commonly worn for late afternoon or evening receptions.
Ensure that the colour palette is consistent throughout the wedding party, eg light charcoal suits can work well with pastel colours, deeper charcoal can contrast well with a deeper colours like magenta or red. Also consider shades of blue and navy.
It is acceptable for the groom to wear a different colour/cut from the groomsmen but ensure that the groomsmen are all identical.
Do not overlook the impact of shoes and belts, ensure they are all matching and clean. At the very minimum the same colour and style.
Remember if the bride is wearing ivory – all the guys need to wear ivory shirts. A subtle difference, but it will be obvious in the photos if they wear white against an ivory gown.
If buying suits, ensure they take the time to have them altered well before the wedding date.
If they are hiring ensure they all attend the final fitting.
The button hole flower is not worn in the button hole of a jacket but carefully pinned to the lapel from the back