Shoe laces

Good shoe laces can be hard to come by. Supermarkets and basic shoe-repair shops (the kind that also offer key-cutting services) usually don't have a big selection, especially not for dress shoes.

My cobbler in Geneva (Cordonnerie de Longemalle & Cordonnerie des Marronniers) sells shoe laces from Ringelspitz and I've been happy with their references that are 2mm thick and 75cm long (such as the dark brown 35-75-132).