Cufflinks occupy little space and carry a precise formal signal.
Begin with the cuff
Use cufflinks with shirts designed for them, most commonly French or double cuffs. The link should secure the fabric without pulling, rotating heavily, or distorting the sleeve.
Choose metal for the system
Silver-tone metal, gold-tone metal, onyx, enamel, mother-of-pearl, and restrained stone can all work. The watch and other visible hardware do not need to match exactly, but the relationship should feel deliberate.
Scale follows occasion
Formal evening dress usually benefits from restrained geometry and controlled shine. Business settings reward subtlety. Personal motifs can work in informal settings when they remain small enough not to turn the cuff into a novelty display.
Mixing metals is allowed
There is no absolute rule requiring identical metals. Repetition and proportion matter more than exact matching.
Care by material
Wipe after wear and store separately. Silver, plated metal, enamel, stone, and pearl may require different cleaning methods. Avoid universal jewellery-cleaner advice.
THE GRAY CRAB view: cufflinks should confirm formality for the person close enough to notice.